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(3/2)*(-7*x-1) = -6 // + 6
(3/2)*(-7*x-1)+6 = 0
3/2*(-7*x-1)+6 = 0
3/2*(-7*x-1)+6 = 0
9/2-21/2*x = 0
9/2-21/2*x = 0
9/2-21/2*x = 0 // - 9/2
-21/2*x = -9/2 // : -21/2
x = -9/2/(-21/2)
x = 3/7
x = 3/7
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