Answer:
The family bought approximately 2 bags of chips.
Step-by-step explanation:
Given:
Total spent by family = $5.50
We need to find bags of chips did the family buy.
Solution:
Let number of bags of chips bought be 'x'.
Also Given:
The number of candy bars was twice as much as the number of bags of chips.
number of candy bars = 
Now we can say that;
Total spent by family is equal to sum of the number of bags of chips bought and number of candy bars.
framing in equation form we get;

Dividing both side by 3 we get;

Hence the family bought approximately 2 bags of chips.