3 years ago

Mary's age is 10 years less than 2 times Joe's age. If the difference between their ages is 30, how old is Mary?

Mathematics

2 answers:

svlad2 [7]3 years ago

7 0

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!!!

zheka24 [161]3 years ago

4 0

Answer:

its 5

Step-by-step explanation:

cause 2 divided by 30is 15 minus 10 its 5

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