X plus 2y equals -1 4x plus 3y equals -9?

Answer 1

Presumably this is a simultaneous equation question which can be solved using the elimination method?

4(x+2y = -1)

4x+3y = -9

First multiply all terms in the top equation by 4:

4x+8y = -4

4x+3y = -9

Subtract the bottom equation from the top equation in order to eliminate x remembering that a - - is equal to a + So -4 - -9 is equal to 5:

5y = 5 => y = 1

Substitute the value of y into the original equations to find the value of x:

Therefore: x = -3 and y = 1