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(-7/4)*x-(9/2) = (-9/2)*x // - (-9/2)*x
(-7/4)*x-((-9/2)*x)-(9/2) = 0
(-7/4)*x+(9/2)*x-9/2 = 0
11/4*x-9/2 = 0 // + 9/2
11/4*x = 9/2 // : 11/4
x = 9/2/11/4
x = 18/11
x = 18/11
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