Respuesta :

Answer:

its 5

Step-by-step explanation:

cause 2 divided by 30is 15 minus 10 its 5

biffyboffboof

Answer:

m=mary age

j=joe age

m=2j-10

m-j=30

rewrite

m=2j-10

m=j+30

so that means that

2j-10=j+30

-j

j-10=30

+10

j=40 so lets plug this in

m=2(40)-10

m=70

Hope This Helps!!!