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x in (-oo:+oo)
2*x-7 = 7*x-37 // - 7*x-37
2*x-(7*x)-7+37 = 0
2*x-7*x-7+37 = 0
30-5*x = 0 // - 30
-5*x = -30 // : -5
x = -30/(-5)
x = 6
x = 6
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