No.17 pakai cara ya..

1/3(2x+1)=1/4(3x-1)
2/3x+1/3=3/4x-1/4
2/3x-3/4x=-1/4-1/3
8/12x-9/12x=-3/12-4/12
-1/12x=-7/12
x=-7/12*-12/1
x=7

maka nilai x+2=7+2=9