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(4/7)*x-((3/4)*x)+10 = 45/4 // - 45/4
(4/7)*x-((3/4)*x)-(45/4)+10 = 0
(-3/4)*x+(4/7)*x-45/4+10 = 0
-5/28*x-5/4 = 0 // + 5/4
-5/28*x = 5/4 // : -5/28
x = 5/4/(-5/28)
x = -7
x = -7
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