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x in (-oo:+oo)
35-(x/2) = x/5 // - x/5
35-(x/2)-(x/5) = 0
35-7/10*x = 0 // - 35
-7/10*x = -35 // : -7/10
x = -35/(-7/10)
x = 50
x = 50
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