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(1/7)*x-6 = -493/84 // + -493/84
(1/7)*x-(-493/84)-6 = 0
(1/7)*x+493/84-6 = 0
1/7*x-11/84 = 0 // + 11/84
1/7*x = 11/84 // : 1/7
x = 11/84/1/7
x = 11/12
x = 11/12
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