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(1/5)*(x+2) = 3*x-(4*(3*x-x))-8 // - 3*x-(4*(3*x-x))-8
(1/5)*(x+2)+4*(3*x-x)-(3*x)+8 = 0
(1/5)*(x+2)+4*(3*x-x)-3*x+8 = 0
1/5*(x+2)+2*4*x-3*x+8 = 0
1/5*(x+2)+2*4*x-3*x+8 = 0
41/5*x-3*x+2/5+8 = 0
26/5*x+2/5+8 = 0
26/5*x+42/5 = 0
26/5*x+42/5 = 0
26/5*x+42/5 = 0 // - 42/5
26/5*x = -42/5 // : 26/5
x = -42/5/26/5
x = -21/13
x = -21/13
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