Solve: If 8x + 5y = 9 and 3x + 2y = 4, find the value of x.
A.-2
B.5
C.2
D.-5
A
This question tests the standard Linear Equations concept and its direct application to the stated values.
The given quantities are substituted into the standard formula or relation, and the expression is simplified step by step following BODMAS/identity rules.
Carrying out the calculation yields the required value: -2.
Hence, the correct answer is -2.
If 2x(x + y + z) = 250, 2y(x + y + z) = 100, 2z(x + y + z) = 100, then find the value of (3x + 6y + 15z).
If x + 2y = 27 and x - 2y = -1, find the value of y.
If tan 3 θ = cot(θ - 22°), where 3 θ is an angle, find the value of θ.
1 + tan 15° cot 75° is equal to:
The value of cot (-315°) is :
θ = 135°; γ = 15°.
What is the value of 2 cos(θ) sin(γ)?
If tan(90 – θ) = \(\frac{2}{\sqrt3}\), then the value of \(2\sqrt3\) tan θ + 1 is: