x * 5 =25
x = 25 / 5
x = 5
9 - x = 6
x = 9- 6
x = 3
-18 / x = 3
x = -18 / 3
x = -6
x + 4 = 0
x = 0 - 4
x = -4
x * 5 =25
x = 25 / 5
x = 5
9 - x = 6
x = 9- 6
x = 3
-18 / x = 3
x = -18 / 3
x = -6
x + 4 = 0
x = 0 - 4
x = -4