Gabrielle is 7 years younger than Mikhail. The sum of their ages is 65. What is Mikhail's age?
years old

Answer

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Answer

Substitute the first equation into the second, then solve for $m$ : $(m - 7) + m = 65$ .

Steps

Step 1 ：Let Gabrielle's age be $g$ and Mikhail's age be $m$ .

Step 2 ：Formulate the system of equations: $g = m - 7$ and $g + m = 65$ .

Step 3 ：Substitute the first equation into the second, then solve for $m$ : $(m - 7) + m = 65$ .