Question

Denise is 7 years younger than Alma. Misty istwice as old as Alma. All together, they havean age of 37. How old is Denise?

Answer 1

Data:

Denise (D) = A-7

Alma (A)= A

Misty (M) = 2A

D+A+M=37

D=?

You can use the add of the age of the three persons:

`D+A+M=37`

Knowing that:

D=A-7

M=2A

You substitute the value of D and M, as follow:

`(A-7)+A+(2A)=37`

You can clear the A to find the value of that varaible:

`A-7+A+2A=37`
`4A-7=37`
`4A=37+7`
`A=(44)/(4)=11`Then the age of Denise is: 4
`D=A-7=11-7=4`