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(1/5)*(x+4) = 9*x-(17*(1-x))-8 // - 9*x-(17*(1-x))-8
(1/5)*(x+4)+17*(1-x)-(9*x)+8 = 0
(1/5)*(x+4)+17*(1-x)-9*x+8 = 0
1/5*(x+4)+17*(1-x)-9*x+8 = 0
1/5*(x+4)+17*(1-x)-9*x+8 = 0
8-84/5*x-9*x+89/5 = 0
8-129/5*x+89/5 = 0
129/5-129/5*x = 0
129/5-129/5*x = 0
129/5-129/5*x = 0 // - 129/5
-129/5*x = -129/5 // : -129/5
x = -129/5/(-129/5)
x = 1
x = 1
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