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2/3-(x/4) = 7/12 // - 7/12
2/3-(x/4)-(7/12) = 0
2/3-(x/4)-7/12 = 0
1/12-1/4*x = 0 // - 1/12
-1/4*x = -1/12 // : -1/4
x = -1/12/(-1/4)
x = 1/3
x = 1/3
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