Question

Use equations to solve the following questions

Daniel and Travis are twins, but their sister Phillipa is 3 years older. If the sum of their
three ages is 36, how old are the twins?

Answer 1

Let the age of Phillipa is : y:

And the twins age be : x

So:

y = x + 3


So:

x + x + y = 36

So:

2x + x + 3 = 36

3x = 33

Find x from here..

Answer 2

Divide both the sides by 3and you will get x..

Answer 3

Let the twins age be a and Phillipa be b
total age is equal to sum of all ages or 36=a+a+b or 36=2a+b
you know Phillipa is 3 years older, so b=a+3
substitute that back in:
36=2a+(a+3)
36=3a+3
Now solve for a to find the twins age.
36-3=3a
33/3=a
11=a
Twins are 11 years old.

Answer 4

Thanks for your help

Answer 5

Welcome dear..