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10*y = ((7*10)/10)*x-(10*14) // - ((7*10)/10)*x-(10*14)
10*y-(((7*10)/10)*x)+10*14 = 0
10*y-7*x+10*14 = 0
10*y-7*x+140 = 0 // - 10*y+140
-7*x = -(10*y+140) // : -7
x = (-(10*y+140))/(-7)
x = (10*y+140)/7
x = (10*y+140)/7
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