Question

What is the x-coordinate in the solution of the system of equations y =
=-
I and 42
9y= -402

Answer 1

It’s simple really, the answer is x = -4

y = -2/3x

So we plug in y = -2/3x for the value of y in the equation we need to solve.

4x - 9(-2/3x) = -40 (9 • -2/3x = -6x)

4x - (-6x) = -40 Multiply together

4x + 6x = -40 Combine like terms

10x = -40 Isolate x

x = -4