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(12/7)*x = 2*x+(2/5)*x-1 // - 2*x+(2/5)*x-1
(12/7)*x-(2*x)-((2/5)*x)+1 = 0
(12/7)*x-2*x+(-2/5)*x+1 = 0
1-24/35*x = 0 // - 1
-24/35*x = -1 // : -24/35
x = -1/(-24/35)
x = 35/24
x = 35/24
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