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x in (-oo:+oo)
(2*x)/5+10 = 57 // - 57
(2*x)/5-57+10 = 0
2/5*x-47 = 0 // + 47
2/5*x = 47 // : 2/5
x = 47/2/5
x = 235/2
x = 235/2
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