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(2/5)*x-((9/25)*x) = 2 // - 2
(2/5)*x-((9/25)*x)-2 = 0
(2/5)*x+(-9/25)*x-2 = 0
1/25*x-2 = 0 // + 2
1/25*x = 2 // : 1/25
x = 2/1/25
x = 50
x = 50
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