Use substitution to solve the system of equations given below.

Question

8x - 4y = 16
2x - y = 4

Answer 1

2x - y = 4

Subtract 4 and add y to both sides of the above equation.

y = 2x -4

8x - 4y = 16

Substitute 2x-4 for y in last equation and solve for x. Insert that value into the first equation and solve for y. Check by inserting both values into the second equation.