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b)2n+1
c)2(n+1)
d)1/3*n=n/3
e)n/3*9
f)2n(n+1)
3(x-1) = 2(x+1); 3x -3= 2x+2; x= 5.
b)
2x+1.
c)
2(x+1).
d)1/3 x
e) 1/3 (x+9)
f)
2x(x+1) = 2x^2 + 2x