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

Answer 1

Let's assume Jacob saves x dollars.
Since Jarrold saves $20 more than Jacob, Jarrold will save x+20 dollars.
Together, they save x+(x+20)=78 dollars.
This simplifies to 2x+20=78
Subtracting 20 from both sides gives 2x=58
Dividing both sides by 2 gives x=<<29=29>>29 dollars. Answer: \boxed{29}.