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1/2-((5/4)*x) = -2/3 // + -2/3
1/2-((5/4)*x)-(-2/3) = 0
(-5/4)*x+1/2+2/3 = 0
7/6-5/4*x = 0 // - 7/6
-5/4*x = -7/6 // : -5/4
x = -7/6/(-5/4)
x = 14/15
x = 14/15
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