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7/4-((2*x)/5) = x/2-(1/2) // - x/2-(1/2)
7/4-((2*x)/5)-(x/2)+1/2 = 0
(-2/5)*x-(x/2)+7/4+1/2 = 0
9/4-9/10*x = 0 // - 9/4
-9/10*x = -9/4 // : -9/10
x = -9/4/(-9/10)
x = 5/2
x = 5/2
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