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kedua ruas dikalikan dengan 6 shg
1/2*6(x+3)= 12*6 -2/3x*6
3(x+3)=72-4x
3x+9= 72-4x
3x+4x=72-9
7x= 63
x=9
nilai x+2= 9+2
=11
mungkin seperti ini caranya