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(25*x)/(-7)-3 = -5*x // + -5*x
(25*x)/(-7)-(-5*x)-3 = 0
(25*x)/(-7)+5*x-3 = 0
10/7*x-3 = 0 // + 3
10/7*x = 3 // : 10/7
x = 3/10/7
x = 21/10
x = 21/10
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