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(1/3)*x-(1/5) = -1/2 // + -1/2
(1/3)*x-(1/5)-(-1/2) = 0
(1/3)*x-1/5+1/2 = 0
1/3*x+3/10 = 0 // - 3/10
1/3*x = -3/10 // : 1/3
x = -3/10/1/3
x = -9/10
x = -9/10
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