Answer:
C is correct.
Step-by-step explanation:
Given: System of equation
We have to solve system of equation by eliminating y
So, first we will make the coefficient of y same with opposite sign.
Coefficient of y in first equation 3/4
Coefficient of y in 2nd equation 1/2
Multiply second equation by -3/2 to make coefficient of y same
Add both equation and eliminate y
Hence, We multiply by -3/2 to eliminate y and solve the system of equation.