7x+7=28x
28x-7x=7
21x=7
x=3
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7x + 8 = 36 - 8 = - 8 -------------- 7x = 28 7x/7 = 28/7 x = 4
3x + 7 = -4x + 28 implies 7x + 7 = 28
7x + 8 = 36 Therefore, 7x = 28 x = 28/7 x = 4
7x+5-14 = 28 7x = 28+14-5 7x = 37 x = 37/7 = 5.'285714' recurring
12x - 28 = 7x - 63Subtract 7x from each side:5x - 28 = -63Add 28 to each side:5x = -35Divide each side by 5:x = -7