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x in (-oo:+oo)
x = (-(3*y)-48)/10 // - (-(3*y)-48)/10
x-((-(3*y)-48)/10) = 0
x-((-3*y-48)/10) = 0
(-1*(-3*y-48))/10+x = 0
(-1*(-3*y-48))/10+(10*x)/10 = 0
10*x-1*(-3*y-48) = 0
10*x+3*y+48 = 0
(10*x+3*y+48)/10 = 0
(10*x+3*y+48)/10 = 0 // * 10
10*x+3*y+48 = 0
10*x+3*y+48 = 0 // - 3*y+48
10*x = -(3*y+48) // : 10
x = (-(3*y+48))/10
x = (-(3*y+48))/10
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