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