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(1/7)*(x+4) = 2*x-(5*(3-x))-5 // - 2*x-(5*(3-x))-5
(1/7)*(x+4)+5*(3-x)-(2*x)+5 = 0
(1/7)*(x+4)+5*(3-x)-2*x+5 = 0
1/7*(x+4)+5*(3-x)-2*x+5 = 0
1/7*(x+4)+5*(3-x)-2*x+5 = 0
5-34/7*x-2*x+109/7 = 0
5-48/7*x+109/7 = 0
144/7-48/7*x = 0
144/7-48/7*x = 0
144/7-48/7*x = 0 // - 144/7
-48/7*x = -144/7 // : -48/7
x = -144/7/(-48/7)
x = 3
x = 3
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