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-((2/5)*x)-1/2 = -1/3 // + -1/3
-((2/5)*x)-1/2-(-1/3) = 0
(-2/5)*x-1/2+1/3 = 0
-2/5*x-1/6 = 0 // + 1/6
-2/5*x = 1/6 // : -2/5
x = 1/6/(-2/5)
x = -5/12
x = -5/12
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