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6*x+(5/6)*x+6 = 83/7 // - 83/7
6*x+(5/6)*x-(83/7)+6 = 0
6*x+(5/6)*x-83/7+6 = 0
41/6*x-41/7 = 0 // + 41/7
41/6*x = 41/7 // : 41/6
x = 41/7/41/6
x = 6/7
x = 6/7
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