Jarrold saved $20 more than Jacob. If they all save $78 together, how much money will Jacob save? using mostly subtraction

Answer 1

Let's assume Jacob saves x dollars.
Since Jarrold saves $20 more than Jacob, he will save x + $20.
Together, Jacob and Jarrold save x + x + $20 = $78.
Combining like terms, we get 2x + $20 = $78.
Subtracting $20 from both sides, we get 2x = $58.
Dividing both sides by 2, we get x = $29.
Jacob will save $29. Answer: \boxed{29}.