z - 80 = 100
z = 180
5x - 6 = 2x + 3
x = 3
9x - 25 = 2
x = 3
3x + 7 = 2x + 9
x = 3
5x + 3x + 4 = 5x + 4 + 9
x = 3
y + 6 = 22
y = 16
5x + 3 = 2x + 9
x = 2
x - 9 = 9
x = 18
x -9 = -6x + 19
x = 4
5x + 50 = 120
x = 14
9z - 25 = 65
z = 10
x+14 = 20
x= 6
7x - 11 = 10
x = 3
x + 12 = 102
x = 90
3x + 4 = 19
x = 5