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(-4/5)*x-17 = (-10/3)*x-55 // - (-10/3)*x-55
(-4/5)*x-((-10/3)*x)-17+55 = 0
(-4/5)*x+(10/3)*x-17+55 = 0
38/15*x+38 = 0 // - 38
38/15*x = -38 // : 38/15
x = -38/38/15
x = -15
x = -15
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