Answer:
D = $34
Explanation:
Let's use J to represent Jumps' savings, and D to represent David's savings.
J = $55
We know David's savings is equal to 21 less than Jumps'.
This means that if we subtract 21 from 55, we will have David's savings.
D = 55 - 21
Now, solve:
D = 34
This means David has $34 in savings.