Question

I don't know what to do ?

Answer 1

Let x = mary's age
let 3x = mike's age

3x=2x+4    subtract 2x from both sides
x=4

Mary is 4 years old.
Brainliest would be appreciated :)

Answer 2

Enable M = Mary's age now So Mike's age is 3M 3M + 4 = 2 (M + 4) = 2M + 8 Now, subtract 2M from the two factors. then you definitely have: M + 4 = 8 or M = 4 examine: Mike is now 12. In 4 years, Mary would be 8 and Mike would be sixteen.