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6*x-((2/3)*(9-(15*y))) = 4*x-(4*y)+8 // - 4*x-(4*y)+8
6*x-((2/3)*(9-(15*y)))-(4*x)+4*y-8 = 0
(-2/3)*(9-15*y)+6*x-4*x+4*y-8 = 0
6*x-2/3*(9-15*y)-4*x+4*y-8 = 0
6*x-2/3*(9-15*y)-4*x+4*y-8 = 0
6*x-4*x+10*y+4*y-8-6 = 0
2*x+10*y+4*y-8-6 = 0
2*x+14*y-8-6 = 0
2*x+14*y-14 = 0
2*x+14*y-14 = 0
2*x+14*y-14 = 0 // - 14*y-14
2*x = -(14*y-14) // : 2
x = (-(14*y-14))/2
x = (14-(14*y))/2
x = (14-(14*y))/2
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