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(2*x)/3 = -1/2 // + -1/2
(2*x)/3-(-1/2) = 0
(2*x)/3+1/2 = 0
2/3*x+1/2 = 0 // - 1/2
2/3*x = -1/2 // : 2/3
x = -1/2/2/3
x = -3/4
x = -3/4
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