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9 = 9*x+7*x+7/4+3/2 // - 9*x+7*x+7/4+3/2
9-(9*x)-(7*x)-(7/4)-(3/2) = 0
9-9*x-7*x-7/4-3/2 = 0
23/4-16*x = 0 // - 23/4
-16*x = -23/4 // : -16
x = -23/4/(-16)
x = 23/64
x = 23/64
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