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1/4 = (7/2)*x-4 // - (7/2)*x-4
1/4-((7/2)*x)+4 = 0
(-7/2)*x+1/4+4 = 0
17/4-7/2*x = 0 // - 17/4
-7/2*x = -17/4 // : -7/2
x = -17/4/(-7/2)
x = 17/14
x = 17/14
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