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(5*x)/7-1 = (3*x)/4-(5/4) // - (3*x)/4-(5/4)
(5*x)/7-((3*x)/4)+5/4-1 = 0
(5*x)/7+(-3/4)*x+5/4-1 = 0
1/4-1/28*x = 0 // - 1/4
-1/28*x = -1/4 // : -1/28
x = -1/4/(-1/28)
x = 7
x = 7
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