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(1/7)*(7*x-9) = -1/4-(5/4) // + -1/4-(5/4)
(1/7)*(7*x-9)-(-1/4)+5/4 = 0
(1/7)*(7*x-9)+1/4+5/4 = 0
1/7*(7*x-9)+1/4+5/4 = 0
(1/7*4*(7*x-9))/4+1/4+5/4 = 0
1/7*4*(7*x-9)+1+5 = 0
4*x-29/7+5 = 0
4*x+6/7 = 0
(4*x+6/7)/4 = 0
(4*x+6/7)/4 = 0 // * 4
4*x+6/7 = 0
4*x+6/7 = 0 // - 6/7
4*x = -6/7 // : 4
x = -6/7/4
x = -3/14
x = -3/14
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