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(3/4)*(5/9-(4*x))-(6/9) = 8/9 // - 8/9
(3/4)*(5/9-(4*x))-(6/9)-(8/9) = 0
(3/4)*(5/9-4*x)-2/3-8/9 = 0
3/4*(5/9-4*x)-2/3-8/9 = 0
(3/4*3*9*(5/9-4*x))/(3*9)+(-2*9)/(3*9)+(-8*3)/(3*9) = 0
3/4*3*9*(5/9-4*x)-2*9-8*3 = 0
-81*x-24-27/4 = 0
-81*x-123/4 = 0
(-81*x-123/4)/(3*9) = 0
(-81*x-123/4)/(3*9) = 0 // * 3*9
-81*x-123/4 = 0
-81*x-123/4 = 0 // + 123/4
-81*x = 123/4 // : -81
x = 123/4/(-81)
x = -41/108
x = -41/108
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