Mishelle is 7 years younger than Paul. Given that the sum of their ages is 29, find their ages

Answer 1

P = M + 7

P + M = 39

Substitute M+7 for P in second equation, solve for M, then use first equation to find P.

Answer 2

Paul is X yrs. old.
Mishelle is X - 7.

x + (x-7) = 29.
X = ?
x - 7 = ?.