Question

Solve this system of equations using substitution. Put your answer in ordered pair form, (x, y).
x + 2y = 7
2x + y = 8

Answer 1

x = 7 - 2y
2(7 - 2y) + y = 8
14 - 4y + y = 8
14 - 3y = 8
-3y = -6
y = 2

Answer 2

x=7-2y
therefore
14-4y+y=8
therefore y =2
therfore x=3
(3,2)