Question

Using substitution, solve the system of equations:

−4x+4y=8
y=−2x
and represent the solution in graph coordinates.

Answer 1

The solution of the equation is

How to solve the equation

The given system of equation is −4x + 4y = 8 and y = −2x

by substitution we have

−4x + 4(-2x) = 8

-4x - 8x = 8

-12x = 8

x = -8/12

x = -2/3 = -0.6667

substituting x to solve for y

y = -2x

y = -2 * -2/3

y = 4/3 = 1.333