x=8.5
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8+7x = 20+3x 7x-3x = 20-8 4x = 12 x = 3
x = 0
3x + 5 = 20 Subtract '5' from both sides 3x = 15 Divide both sides by '3' x = 5 The answer!!!!!
3x + 4 = 24 subtract 4 from both sides 3x = 20 divide both sides by 3 x = 20/3 = 6 2/3 = 6.66666666.....
if 3x+7 = 3 then 3x = 3-7 3x = -4 then, x = -4/3