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x in (-oo:+oo)
48 = (12/19)*x // - (12/19)*x
48-((12/19)*x) = 0
(-12/19)*x+48 = 0
48-12/19*x = 0 // - 48
-12/19*x = -48 // : -12/19
x = -48/(-12/19)
x = 76
x = 76
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