7) y = 4x + 3
y = 2x + 7
y = y
4x + 3 = 2x + 7
4x - 2x = 7 - 3
2x = 4
x = 4/2
x = 2
To check:
y = 4x + 3 y = 2x + 7
y = 4(2) + 3 y = 2(2) + 7
y = 8 + 3 y = 4 + 7
y = 11 y = 11
8) y = -3x + 6
y = x + 2
y = y
-3x + 6 = x + 2
-3x - x = 2 - 6
-4x = -4
x = -4/-4
x = 1
y = -3x + 6 y = x + 2
y = -3(1) + 6 y = 1 + 2
y = -3 + 6 y = 3
y = 3
