7x + 16 = 3x + 4 4x = -12 x = -3
y = 4x-3
(4 + 2x) - (-2x + 1) = 13 + 6 4 + 2x + 2x -1 = 19 4x +3 = 19 4x = 19 - 3 4x = 16 therefore x = 16/4 x = 4
3+6x = 4x+9 6x-4x = 9-3 2x = 6 x = 3
x=3
5x - 4x = 13 - 3 ie x = 10
5+4x-7 = 4x+3-x 4x-2 = 3x+3 4x-3x = 3+2 x = 5
= 3
-4x-4 equals -16. Add 4 to both sides; -4x equals -12. Divide both sides by -4; x equals 3.
4x+9 = 7x+3 4x-7x = 3-9 -3x = -6 x = 2
-4x+3 = 23+6x -4x-6x = 23-3 -10x = 20 x = -2
If 4x + 7 = 3... then x must equal -1