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2/3 = (7*x)/12-(x/3) // - (7*x)/12-(x/3)
x/3-((7*x)/12)+2/3 = 0
(-7/12)*x+x/3+2/3 = 0
2/3-1/4*x = 0 // - 2/3
-1/4*x = -2/3 // : -1/4
x = -2/3/(-1/4)
x = 8/3
x = 8/3
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