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(13/2)*x+5 = (9/2)*x+19 // - (9/2)*x+19
(13/2)*x-((9/2)*x)-19+5 = 0
(13/2)*x+(-9/2)*x-19+5 = 0
2*x-14 = 0 // + 14
2*x = 14 // : 2
x = 14/2
x = 7
x = 7
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