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(1/7)*(7*x-1) = -6/7-(3/7) // + -6/7-(3/7)
(1/7)*(7*x-1)-(-6/7)+3/7 = 0
(1/7)*(7*x-1)+6/7+3/7 = 0
1/7*(7*x-1)+6/7+3/7 = 0
(1/7*7*(7*x-1))/7+6/7+3/7 = 0
1/7*7*(7*x-1)+3+6 = 0
7*x+3+5 = 0
7*x+8 = 0
(7*x+8)/7 = 0
(7*x+8)/7 = 0 // * 7
7*x+8 = 0
7*x+8 = 0 // - 8
7*x = -8 // : 7
x = -8/7
x = -8/7
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