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(1/5)*(x+4) = 9*x-(3*(1-x))-8 // - 9*x-(3*(1-x))-8
(1/5)*(x+4)+3*(1-x)-(9*x)+8 = 0
(1/5)*(x+4)+3*(1-x)-9*x+8 = 0
1/5*(x+4)+3*(1-x)-9*x+8 = 0
1/5*(x+4)+3*(1-x)-9*x+8 = 0
19/5-14/5*x-9*x+8 = 0
19/5-59/5*x+8 = 0
59/5-59/5*x = 0
59/5-59/5*x = 0
59/5-59/5*x = 0 // - 59/5
-59/5*x = -59/5 // : -59/5
x = -59/5/(-59/5)
x = 1
x = 1
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