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4/5-x = 7*x-(196/5) // - 7*x-(196/5)
4/5-x-(7*x)+196/5 = 0
4/5-x-7*x+196/5 = 0
40-8*x = 0 // - 40
-8*x = -40 // : -8
x = -40/(-8)
x = 5
x = 5
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