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(4/5)*(x+6) = 16 // - 16
(4/5)*(x+6)-16 = 0
4/5*(x+6)-16 = 0
4/5*(x+6)-16 = 0
4/5*x-56/5 = 0
4/5*x-56/5 = 0
4/5*x-56/5 = 0 // + 56/5
4/5*x = 56/5 // : 4/5
x = 56/5/4/5
x = 14
x = 14
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