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(-4/5)*x+8 = 80/11 // - 80/11
(-4/5)*x-(80/11)+8 = 0
(-4/5)*x-80/11+8 = 0
8/11-4/5*x = 0 // - 8/11
-4/5*x = -8/11 // : -4/5
x = -8/11/(-4/5)
x = 10/11
x = 10/11
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