Question

Huilan is 7 years older than Thomas. The sum of their ages is 89 . What is Thomas's age?

Answer 1

89-7=82 82/2=41 Thomas is 41.

Answer 2

Huilan: x + 7   Thomas: x

x + 7 + x = 89
2x + 7 = 89
2x = 82
x = 41
So Thomas is 41 years old