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y = (-10/7)*x+39/7 // - (-10/7)*x+39/7
y-((-10/7)*x)-(39/7) = 0
(10/7)*x+y-39/7 = 0
10/7*x+y-39/7 = 0 // - y-39/7
10/7*x = -(y-39/7) // : 10/7
x = (-(y-39/7))/10/7
x = 7/10*(39/7-y)
x = 7/10*(39/7-y)
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