Hi! I'm a little confused about this problem, so I would appreciate help in solving it! I started it, but the answer doesn't make sense to me. Here's the problem:

Maria is 5 years younger than Betty. In 4 years, Maria will have 4 times the age Betty was 3 years ago. How old are they now?

Here's what I did:

Marķa's age: x

Betty's age: x+5

Marķas age 4 years from now: x+4

Betty's age 3 years ago: (x+5)-3

If Maria will be 4 times Betty's age 3 years ago, then: 4((x+5)-3)

So, I set up an equation: x+4=4((x+5)-3)

x+4=4x+20-12

x+4=4x+8

-8+4=4x-x

-4=3x

x= -3/4 ??

Help!

Thanks!