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x in (-oo:+oo)
x/3-(x/4) = 10/3 // - 10/3
x/3-(x/4)-(10/3) = 0
x/3-(x/4)-10/3 = 0
1/12*x-10/3 = 0 // + 10/3
1/12*x = 10/3 // : 1/12
x = 10/3/1/12
x = 40
x = 40
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