Question

Jeremy is 7 years older than Jessica. In 9 years the sum of their ages will be 61. How old is Jeremy now?

Answer 1

\[(R-7)=S\]
\[(R+9)+(S+9)=61\]
\[R+S+18=61\]
\[R+S=43\]
since R-7=S
R+(R-7)=43
2R=36
R=18
Jeremy is 18 years old

Answer 2

this was wrong

Answer 3

Sar9: Have you read through Jing's discussion looking for anything that needs correction? You need to take more responsibility, and not just label someone else's help "wrong."

Answer 4

lol it was wrong though. dont comment if ur not gonna help.

Answer 5

I see that jing has used the letter R to denote Jeremy's age, and the letter S to denote Jessica's age. Good going.

I agree with this: "(R-7)=S)" Jeremy is older than Jessica.

Answer 6

I also agree with (R+9)+(S+9)=61.

sar9: Your turn. Solve this set of simultaneous equations for R and S.