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x in (-oo:+oo)
x/10 = -12/5 // + -12/5
x/10-(-12/5) = 0
x/10+12/5 = 0
1/10*x+12/5 = 0 // - 12/5
1/10*x = -12/5 // : 1/10
x = -12/5/1/10
x = -24
x = -24
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