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(1/5)*(x+4) = 5*x-(18*(1-x))-4 // - 5*x-(18*(1-x))-4
(1/5)*(x+4)+18*(1-x)-(5*x)+4 = 0
(1/5)*(x+4)+18*(1-x)-5*x+4 = 0
1/5*(x+4)+18*(1-x)-5*x+4 = 0
1/5*(x+4)+18*(1-x)-5*x+4 = 0
4-89/5*x-5*x+94/5 = 0
4-114/5*x+94/5 = 0
114/5-114/5*x = 0
114/5-114/5*x = 0
114/5-114/5*x = 0 // - 114/5
-114/5*x = -114/5 // : -114/5
x = -114/5/(-114/5)
x = 1
x = 1
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