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x in (-oo:+oo)
3-(7*(x-1)) = (x-3)/2-1 // - (x-3)/2-1
1-(7*(x-1))-((x-3)/2)+3 = 0
1-7*(x-1)-((x-3)/2)+3 = 0
(-1*(x-3))/2-7*(x-1)+1+3 = 0
(-7*2*(x-1))/2+(-1*(x-3))/2+(1*2)/2+(2*3)/2 = 0
1*2-7*2*(x-1)-1*(x-3)+2*3 = 0
2-15*x+6+17 = 0
6-15*x+19 = 0
25-15*x = 0
(25-15*x)/2 = 0
(25-15*x)/2 = 0 // * 2
25-15*x = 0
25-15*x = 0 // - 25
-15*x = -25 // : -15
x = -25/(-15)
x = 5/3
x = 5/3
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