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3*(2*x+2)+2/10 = 40*x+1 // - 40*x+1
3*(2*x+2)-(40*x)+2/10-1 = 0
3*(2*x+2)-40*x+2/10-1 = 0
3*(2*x+2)-40*x+1/5-1 = 0
(3*5*(2*x+2))/5+(-40*5*x)/5+1/5+(-1*5)/5 = 0
3*5*(2*x+2)-40*5*x-1*5+1 = 0
1-170*x-5+30 = 0
31-170*x-5 = 0
26-170*x = 0
(26-170*x)/5 = 0
(26-170*x)/5 = 0 // * 5
26-170*x = 0
26-170*x = 0 // - 26
-170*x = -26 // : -170
x = -26/(-170)
x = 13/85
x = 13/85
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