Lindsay is 5 years younger than Mark. Seven years ago, the sum of their ages was

31.

let l be Lindsay's age and let m be Mark's age.Which system of equations represents this situation?

l−7=(m−7)+5

l+m=31

l=m+5

(l−7)+(m−7)=31

l−7=(m−7)−5

l+m=31

l=m−5

(l−7)+(m−7)=31

Guest Apr 10, 2020