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2/3-((3/5)*x) = 11/30 // - 11/30
2/3-((3/5)*x)-(11/30) = 0
(-3/5)*x+2/3-11/30 = 0
3/10-3/5*x = 0 // - 3/10
-3/5*x = -3/10 // : -3/5
x = -3/10/(-3/5)
x = 1/2
x = 1/2
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