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4/(-7) = (-2*x)/3 // - (-2*x)/3
4/(-7)-((-2*x)/3) = 0
(2/3)*x+4/(-7) = 0
2/3*x-4/7 = 0 // + 4/7
2/3*x = 4/7 // : 2/3
x = 4/7/2/3
x = 6/7
x = 6/7
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