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(-2/5)*x+8 = 116/15 // - 116/15
(-2/5)*x-(116/15)+8 = 0
(-2/5)*x-116/15+8 = 0
4/15-2/5*x = 0 // - 4/15
-2/5*x = -4/15 // : -2/5
x = -4/15/(-2/5)
x = 2/3
x = 2/3
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