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(1/5)*x = 19-((1/2)*x) // - 19-((1/2)*x)
(1/5)*x+(1/2)*x-19 = 0
7/10*x-19 = 0 // + 19
7/10*x = 19 // : 7/10
x = 19/7/10
x = 190/7
x = 190/7
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