Question

What is the x-coordinate in the solution of the system of equations
y=-2/3x and 4x - 9y=-40?

Answer 1

x=-4, y=8/3. (-4, 8/3).

Explanation:

4x-9(-2/3x)=-40

4x+18/3x=-40

4x+6x=-40

10x=-40

x=-40/10

x=-4

y=-2/3(-4)

y=8/3