Question 759384
Tom is n years old. In 7 years he will be 21 years old. How old is Tom ?

n + 7 = 21

Subtract 7 from each side of the equation.

n + 7 - 7 = 21 - 7

Combine like terms:

7 - 7 = 0

21 - 7 = 14


Answer:

Tom is 14 years old.







Lennox Obuong
Algebra Tutor
Nairobi, Kenya
Email: lennoxobuong@yahoo.com