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65/8-5*x = 121/4 // - 121/4
65/8-5*x-(121/4) = 0
65/8-5*x-121/4 = 0
-5*x-177/8 = 0 // + 177/8
-5*x = 177/8 // : -5
x = 177/8/(-5)
x = -177/40
x = -177/40
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