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(5/6)*x-(7/12)-1 = (-3/4)*x-(13/6)-1 // - (-3/4)*x-(13/6)-1
(5/6)*x-((-3/4)*x)-(7/12)+13/6-1+1 = 0
(5/6)*x+(3/4)*x-7/12+13/6-1+1 = 0
19/12*x+19/12 = 0 // - 19/12
19/12*x = -19/12 // : 19/12
x = -19/12/19/12
x = -1
x = -1
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