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(1/15)*x-((2/3)*y) = -2 // + 2
(1/15)*x-((2/3)*y)+2 = 0
(1/15)*x+(-2/3)*y+2 = 0
1/15*x-2/3*y+2 = 0 // - 2-2/3*y
1/15*x = -(2-2/3*y) // : 1/15
x = (-(2-2/3*y))/1/15
x = -15*(2-2/3*y)
x = -15*(2-2/3*y)
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