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7/4-((7/12)*x) = 4/3 // - 4/3
7/4-((7/12)*x)-(4/3) = 0
(-7/12)*x+7/4-4/3 = 0
5/12-7/12*x = 0 // - 5/12
-7/12*x = -5/12 // : -7/12
x = -5/12/(-7/12)
x = 5/7
x = 5/7
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