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1-((2/5)*x) = (5/6)*x+38/75 // - (5/6)*x+38/75
1-((2/5)*x)-((5/6)*x)-(38/75) = 0
(-2/5)*x+(-5/6)*x-38/75+1 = 0
37/75-37/30*x = 0 // - 37/75
-37/30*x = -37/75 // : -37/30
x = -37/75/(-37/30)
x = 2/5
x = 2/5
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