Question

All of the girls are Danielle's cabin at camp are the same age. Their counselor is 3 times their age. Danielle's age and her counselor's ages at up to 28. Write an equation that can be used to find the ages of Danielle and her counselor.

Answer 1

Answer:

see the explanation

Step-by-step explanation:

Let

D -----> Danielle's age

C -----> Counselor's age

we know that

$C=3D$ ----> equation A

$D+C=28$ ----> equation B

substitute

equation A in equation B

$D+3D=28$ ----> equation that can be used to find Danielle's age

Solve for D

$4D=28$

$D=7$

Find the value of C

$C=3D$  ---->  equation that can be used to find Counselor's age

substitute the value of D

$C=3(7)=21$

therefore

Danielle's age is 7 and Counselor's age is 21