-4x + 7 = 15 = -4x = 8

Adding +3 to the left side of the equation, -2x -3, will give you (-2x -3) + 3, or -2x on the left side. Adding +3 to the right side of the equation, 4x -15, will give you (4x - 15) +3, or 4x -12. Therefore, (-2x - 3) +3 = (4x - 15) +3 = -2x = 4x - 12 The new equation should read -2x = 4x -12

-2x - 4x = (4x - 12) - 4x = -6x = -12

-6x ÷ -6 = -12 ÷ -6 x = 2

11 = 3 - 7x = 11 - 3 = 3 - 3 - 7x = 8 = - 7x = 8/-7 = -7/7x -8/7 = x or -1. 14 = x

x/5 + 7 = -3 = (x/5 + 7) - 7 = -3 - 7 = x/5 = -10 x/5 * 5 = -10 * 5 x = -50