To represent Tessa's savings over time, we can break down her total savings into two parts: the initial amount she received from her grandma and the amount she saves weekly.
- Tessa received $50 from her grandma.
- She saves an additional $12 per week, which can be represented as 12x for x weeks.
Now we set up the equation based on her goal to have $398 for the tablet:
Total savings (initial amount + savings over weeks) = Cost of the tablet
So the equation will be:
50 + 12x = 398
Now we can fill in the blanks accordingly:
50 + 12x = 398