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(4/5)*x+1 = -(6*x)-131/5 // + -(6*x)-131/5
(4/5)*x+6*x-(-131/5)+1 = 0
(4/5)*x+6*x+131/5+1 = 0
34/5*x+136/5 = 0 // - 136/5
34/5*x = -136/5 // : 34/5
x = -136/5/34/5
x = -4
x = -4
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