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(3/7)*(-5*x-2) = -4 // + 4
(3/7)*(-5*x-2)+4 = 0
3/7*(-5*x-2)+4 = 0
3/7*(-5*x-2)+4 = 0
22/7-15/7*x = 0
22/7-15/7*x = 0
22/7-15/7*x = 0 // - 22/7
-15/7*x = -22/7 // : -15/7
x = -22/7/(-15/7)
x = 22/15
x = 22/15
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