You start with x- $3.49+$2.98= $1.79, x being the total she started with. Add the prices of the notebook ($3.49) and the pen's prize (2.98), that will equal $6.47, so our equation will be X-$6.47 =$1.79, Add 6.47 to both sides and you get X= $1.79 +$6.47 , add them together and X = $8.26. That's her original money she had.
