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x in (-oo:+oo)
3*x+7/8 = 271/8 // - 271/8
3*x+7/8-(271/8) = 0
3*x+7/8-271/8 = 0
3*x-33 = 0 // + 33
3*x = 33 // : 3
x = 33/3
x = 11
x = 11
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