Match List I with List II. Choose the correct answer from the options given below:List I List II (A) \( \frac{14 - (x - 1)}{10} = \frac{x + 5}{6} - 3 \) (I) 4 (B) \( (x - 5)^2 - (x + 3)^2 = 48 \) (II) \( 23^2 \) (C) \( 6(x - 4) = 4(x - 3) - 3(x - 8) \) (III) 61 (D) \( (2x - 1)(2x + 3) = (2x - 7)(2x + 7) \) (IV) -2
(A)-(I), (B)-(II), (C)-(III), (D)-(IV)
This question asks us to match equations from List I with values from List II by solving each equation. Let's solve each equation step by step.
The equation is: \( \frac{14 - (x - 1)}{10} = \frac{x + 5}{6} - 3 \)
First, simplify both sides of the equation:
Left side: \( \frac{14 - x + 1}{10} = \frac{15 - x}{10} \)
Right side: \( \frac{x + 5}{6} - 3 = \frac{x + 5}{6} - \frac{18}{6} = \frac{x + 5 - 18}{6} = \frac{x - 13}{6} \)
So the equation becomes: \( \frac{15 - x}{10} = \frac{x - 13}{6} \)
To eliminate the denominators, multiply both sides by the least common multiple (LCM) of 10 and 6, which is 30.
\( 30 \times \left( \frac{15 - x}{10} \right) = 30 \times \left( \frac{x - 13}{6} \right) \)
\( 3(15 - x) = 5(x - 13) \)
Distribute the numbers on both sides:
\( 45 - 3x = 5x - 65 \)
Now, we want to gather the terms with \( x \) on one side and the constant terms on the other side. Add \( 3x \) to both sides:
\( 45 = 5x + 3x - 65 \)
\( 45 = 8x - 65 \)
Add 65 to both sides:
\( 45 + 65 = 8x \)
\( 110 = 8x \)
Divide both sides by 8:
\( x = \frac{110}{8} \)
Simplify the fraction:
\( x = \frac{55}{4} \)
The solution for equation (A) is \( x = \frac{55}{4} \).
The equation is: \( (x - 5)^2 - (x + 3)^2 = 48 \)
This equation is in the form of a difference of squares, \( a^2 - b^2 \), which can be factored as \( (a - b)(a + b) \).
Here, \( a = x - 5 \) and \( b = x + 3 \).
Substitute \( a \) and \( b \) into the factored form:
\( ( (x - 5) - (x + 3) ) ( (x - 5) + (x + 3) ) = 48 \)
Simplify the expressions inside the parentheses:
First parenthesis: \( (x - 5 - x - 3) = -8 \)
Second parenthesis: \( (x - 5 + x + 3) = 2x - 2 \)
So the equation becomes:
\( (-8)(2x - 2) = 48 \)
Divide both sides by \( -8 \):
\( 2x - 2 = \frac{48}{-8} \)
\( 2x - 2 = -6 \)
Add 2 to both sides:
\( 2x = -6 + 2 \)
\( 2x = -4 \)
Divide both sides by 2:
\( x = \frac{-4}{2} \)
\( x = -2 \)
The solution for equation (B) is \( x = -2 \).
The equation is: \( 6(x - 4) = 4(x - 3) - 3(x - 8) \)
First, expand both sides of the equation by distributing the numbers:
Left side: \( 6 \times x - 6 \times 4 = 6x - 24 \)
Right side: \( (4 \times x - 4 \times 3) - (3 \times x - 3 \times 8) = (4x - 12) - (3x - 24) \)
Right side continued: \( 4x - 12 - 3x + 24 \)
Combine like terms on the right side:
\( (4x - 3x) + (-12 + 24) = x + 12 \)
So the equation becomes:
\( 6x - 24 = x + 12 \)
Subtract \( x \) from both sides:
\( 6x - x - 24 = 12 \)
\( 5x - 24 = 12 \)
Add 24 to both sides:
\( 5x = 12 + 24 \)
\( 5x = 36 \)
Divide both sides by 5:
\( x = \frac{36}{5} \)
The solution for equation (C) is \( x = \frac{36}{5} \).
The equation is: \( (2x - 1)(2x + 3) = (2x - 7)(2x + 7) \)
Expand both sides of the equation.
Left side: \( (2x - 1)(2x + 3) \)
Using FOIL (First, Outer, Inner, Last): \( (2x)(2x) + (2x)(3) + (-1)(2x) + (-1)(3) = 4x^2 + 6x - 2x - 3 = 4x^2 + 4x - 3 \)
Right side: \( (2x - 7)(2x + 7) \)
This is a difference of squares form \( (a - b)(a + b) = a^2 - b^2 \). Here \( a = 2x \) and \( b = 7 \).
\( (2x)^2 - 7^2 = 4x^2 - 49 \)
So the equation becomes:
\( 4x^2 + 4x - 3 = 4x^2 - 49 \)
Subtract \( 4x^2 \) from both sides:
\( 4x - 3 = -49 \)
Add 3 to both sides:
\( 4x = -49 + 3 \)
\( 4x = -46 \)
Divide both sides by 4:
\( x = \frac{-46}{4} \)
Simplify the fraction:
\( x = \frac{-23}{2} \)
The solution for equation (D) is \( x = \frac{-23}{2} \).
List I contains the equations and List II contains potential values. We have solved each equation. Now we present the lists and the matching as provided in the correct answer option text.
| List I (Equations) | List II (Values) |
|---|---|
| (A) \( \frac{14 - (x - 1)}{10} = \frac{x + 5}{6} - 3 \) | (I) 4 |
| (B) \( (x - 5)^2 - (x + 3)^2 = 48 \) | (II) \( 23^2 \) |
| (C) \( 6(x - 4) = 4(x - 3) - 3(x - 8) \) | (III) 61 |
| (D) \( (2x - 1)(2x + 3) = (2x - 7)(2x + 7) \) | (IV) -2 |
Based on the provided correct answer option, the matching is:
Reviewing the techniques used to solve these types of equations is helpful for exam preparation.
| Equation Type | Key Techniques Used |
|---|---|
| Linear Equation with Fractions | Simplify expressions, find LCM of denominators, multiply by LCM, isolate variable. |
| Equation with Squared Terms | Difference of squares formula, expand squares, simplify and solve linear equation. |
| Linear Equation with Parentheses | Distribute, combine like terms, isolate variable. |
| Equation with Products of Binomials | Expand products (like FOIL), simplify, recognize quadratic terms cancelling (leading to linear equation), isolate variable. |
Algebraic equations involve variables, constants, and mathematical operations. Solving an equation means finding the value(s) of the variable(s) that make the equation true.
Practice solving various types of algebraic equations helps build proficiency and confidence in algebraic manipulation skills required for exams.
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