Question

William is 3 times elder than Monica. In 6 years William will be twice as old as Monica. What are their current ages. Use an equation to solve.

Answer 1

William's age is 18 years old and Monica's age is 6 years old

Explanation:

Let

x ----> William's age

y ----> Monica's age

we know that

x=3y ----> equation A

(x+6)=2(y+6) ----> equation B

Substitute equation A in equation B and solve for y

(3y+6)=2(y+6)

3y+6=2y+12

3y-2y=12-6

y=6 years

Find the value of x

x=3(6)=18 years

therefore

William's age is 18 years old

Monica's age is 6 years old