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(9/10)*x-2 = (-19/20)*x+3 // - (-19/20)*x+3
(9/10)*x-((-19/20)*x)-3-2 = 0
(9/10)*x+(19/20)*x-3-2 = 0
37/20*x-5 = 0 // + 5
37/20*x = 5 // : 37/20
x = 5/37/20
x = 100/37
x = 100/37
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