Question

2x3y=-6 5x+2y=4 which of the following eqautions couldbe the result of multipilcation and addition to eliminate a variablein the system of eqautions

Answer 1

2x+3y=6 ----> first equation

5x+2y=4 ------> second equation

Lets try to eliminate x

To eliminate x we need to make the coefficients same

In the given equation we have 2x and 5x

We need to make the coefficients same and opposite sign

We multiply the first equation by 5 and second equation by -2

10x + 15y= 30

-10x - 4y = -8

-------------------------- (add both equations)

0x + 11y = 22

11y = 22

Answer is 11 y = 22