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(8/9)*x+10 = 2*x-13 // - 2*x-13
(8/9)*x-(2*x)+10+13 = 0
(8/9)*x-2*x+10+13 = 0
23-10/9*x = 0 // - 23
-10/9*x = -23 // : -10/9
x = -23/(-10/9)
x = 207/10
x = 207/10
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