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Question

If $2x + 3y = 23$ and $x = 4$, then what is the value of $y$?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
5

The problem asks us to find the value of the variable y given a linear equation and the value of the variable x.

Solving the Linear Equation

We are given the equation:

$2x + 3y = 23$

And we know that:

$x = 4$

Substituting the Value of x

To find y, we substitute the value of x (which is 4) into the given equation:

$2(4) + 3y = 23$

Calculating the Value of y

Now, we simplify and solve for y:

  1. Multiply 2 by 4:

    $8 + 3y = 23$

  2. Subtract 8 from both sides of the equation to isolate the term with y:

    $3y = 23 - 8$

    $3y = 15$

  3. Divide both sides by 3 to find the value of y:

    $y = \frac{15}{3}$

    $y = 5$

Therefore, the value of y is 5.

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Important Questions from Linear Equation in 2 Variable

  1. The sum of two numbers m and n is 84 (m > n) and their difference is 6. What is the ratio of the two numbers?

  2. A piece of cloth costs Rs. 35. If the piece were 4 m longer and each meter was to cost Rs. 1 lesser, then the total cost would remain unchanged. How long is the piece of cloth?

    A. 10 m

    B. 14 m

    C. 12 m

    D. 8 m

  3. What historic achievement did Manu Bhaker accomplish at the 2024 Paris Olympics?

  4. The sum of a two digit number and the number formed by interchanging its digit is 132. If nine is subtracted from the first number, the new number is 3 more than 6 times of the sum of the digits in the first number. Find the first number.

  5. Which of the following options is the solution of the given equation:-

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