Question

Solve the system of equations using substitution.

2x+y=11
x-y=7

Answer 1

x = y + 7

2x + y = 11

2(y + 7) + y = 11

2y + 14 + y = 11

3y + 14 = 11

3y = -3

y = -1

x + 1 = 7

x = 6

(6, -1)