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(1/8)*(8*x-9) = -4/5-(6/5) // + -4/5-(6/5)
(1/8)*(8*x-9)-(-4/5)+6/5 = 0
(1/8)*(8*x-9)+4/5+6/5 = 0
1/8*(8*x-9)+4/5+6/5 = 0
(1/8*5*(8*x-9))/5+4/5+6/5 = 0
1/8*5*(8*x-9)+4+6 = 0
5*x-13/8+6 = 0
5*x+35/8 = 0
(5*x+35/8)/5 = 0
(5*x+35/8)/5 = 0 // * 5
5*x+35/8 = 0
5*x+35/8 = 0 // - 35/8
5*x = -35/8 // : 5
x = -35/8/5
x = -7/8
x = -7/8
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