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(6/7)*x+8 = 71/14-(5*x) // - 71/14-(5*x)
(6/7)*x+5*x-(71/14)+8 = 0
(6/7)*x+5*x-71/14+8 = 0
41/7*x+41/14 = 0 // - 41/14
41/7*x = -41/14 // : 41/7
x = -41/14/41/7
x = -1/2
x = -1/2
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