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x in (-oo:+oo)
(2*x-2)/5 = 56 // - 56
(2*x-2)/5-56 = 0
(2*x-2)/5+(-56*5)/5 = 0
2*x-56*5-2 = 0
2*x-282 = 0
(2*x-282)/5 = 0
(2*x-282)/5 = 0 // * 5
2*x-282 = 0
2*x-282 = 0 // + 282
2*x = 282 // : 2
x = 282/2
x = 141
x = 141
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