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5/16 = (7/12)*x-(1/6) // - (7/12)*x-(1/6)
5/16-((7/12)*x)+1/6 = 0
(-7/12)*x+5/16+1/6 = 0
23/48-7/12*x = 0 // - 23/48
-7/12*x = -23/48 // : -7/12
x = -23/48/(-7/12)
x = 23/28
x = 23/28
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