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(7-3*x)/3+8/3 = (-4*x)/5 // - (-4*x)/5
(7-3*x)/3-((-4*x)/5)+8/3 = 0
(7-3*x)/3+(4/5)*x+8/3 = 0
(7-3*x)/3+(4*x)/5+8/3 = 0
(5*(7-3*x))/(3*5)+(3*4*x)/(3*5)+(5*8)/(3*5) = 0
5*(7-3*x)+3*4*x+5*8 = 0
35-3*x+40 = 0
75-3*x = 0
(75-3*x)/(3*5) = 0
(75-3*x)/(3*5) = 0 // * 3*5
75-3*x = 0
75-3*x = 0 // - 75
-3*x = -75 // : -3
x = -75/(-3)
x = 25
x = 25
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