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x in (-oo:+oo)
2*x+(4*y)/1+3*y = 0
2*x+4*y+3*y = 0
2*x+7*y = 0 // - 7*y
2*x = -(7*y) // : 2
x = (-(7*y))/2
x = (-7*y)/2
x = (-7*y)/2
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