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2/5-(x/2)-10 = -x/3 // + -x/3
2/5-(x/2)-(-x/3)-10 = 0
(1/3)*x-(x/2)+2/5-10 = 0
-1/6*x-48/5 = 0 // + 48/5
-1/6*x = 48/5 // : -1/6
x = 48/5/(-1/6)
x = -288/5
x = -288/5
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