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(14/4)*x+4/2 = 3*y-3 // - 3*y-3
(14/4)*x-(3*y)+4/2+3 = 0
(14/4)*x-3*y+4/2+3 = 0
7/2*x-3*y+5 = 0 // - 5-3*y
7/2*x = -(5-3*y) // : 7/2
x = (-(5-3*y))/7/2
x = -2/7*(5-3*y)
x = -2/7*(5-3*y)
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