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(10-(2*x))/5 = 3 // - 3
(10-(2*x))/5-3 = 0
(10-2*x)/5-3 = 0
(10-2*x)/5+(-3*5)/5 = 0
10-2*x-3*5 = 0
-2*x-5 = 0
(-2*x-5)/5 = 0
(-2*x-5)/5 = 0 // * 5
-2*x-5 = 0
-2*x-5 = 0 // + 5
-2*x = 5 // : -2
x = 5/(-2)
x = -5/2
x = -5/2
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