Question

tonya is 9 years younger than twice marty's age. danielle is 2 years older than tonya. the sum of the ages of the three siblings can be expressed as 3m 8 , where m represents marty's age. how old is marty?

Answer 1

12 if it's 3m+8 4 if it's 3m-8

Explanation:

tonya= 2m-9

daniella= 2+2m-9

t+d+m=3m+8

2m-9+2+2m-9+m=3m+8

5m-16=3m+8

-3m. -3m

2m-16=8

+16. +16

2m=24

m=12