12 years old.
• Let the present age of Billy be represented by x.
• In two years, Billy will be: = x + 2
• Since in 2 years, he will be twice as old as he was 5 years ago, this will be:
x + 2 = 2(x - 5)
The equation to solve the question is:
x + 2 = 2(x - 5)
x + 2 = 2x- 10
Collect like terms
2x - x = 2 + 10
x = 12
• Billy is 12 years old.
