Question

Y + x = 4 and y = 2x - 8 Solve the system of equations.

Answer 1

x = 4, y = 0.

As an ordered pair it is (4, 0).

Explanation:

Rewriting the second equation as the same format as the first:

y + x = 4

y - 2x = - 8 Subtract (1) - (2):

0 + 3x = 12

x = 4.

Plug x = 4 into the first equation:

y + 4 = 4

y = 0.

Check in the second equation:

y = 0 = 2(4) - 8 = 8 -8 = 0. OK.

Answer 2

is this substitution? if it is the answer is (4,0)