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3-(7*x)-((1/4)*x) = -17/4 // + -17/4
3-(7*x)-((1/4)*x)-(-17/4) = 0
(-1/4)*x-7*x+17/4+3 = 0
29/4-29/4*x = 0 // - 29/4
-29/4*x = -29/4 // : -29/4
x = -29/4/(-29/4)
x = 1
x = 1
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