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(2*x)/5-(3*y)+8 = 0
(2*x)/5-3*y+8 = 0
2/5*x-3*y+8 = 0 // - 8-3*y
2/5*x = -(8-3*y) // : 2/5
x = (-(8-3*y))/2/5
x = -5/2*(8-3*y)
x = -5/2*(8-3*y)
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