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(3/4)*(7*x-8) = -6 // + 6
(3/4)*(7*x-8)+6 = 0
3/4*(7*x-8)+6 = 0
3/4*(7*x-8)+6 = 0
21/4*x = 0
(21*x)/4 = 0
(21*x)/4 = 0 // * 4
21*x = 0
21*x = 0 // : 21
x = 0
x = 0
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