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(1/3)*(x+4) = -8 // + 8
(1/3)*(x+4)+8 = 0
1/3*(x+4)+8 = 0
1/3*(x+4)+8 = 0
1/3*x+28/3 = 0
1/3*x+28/3 = 0
1/3*x+28/3 = 0 // - 28/3
1/3*x = -28/3 // : 1/3
x = -28/3/1/3
x = -28
x = -28
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