Question

becca is twice as old as Susan and greg is 9 years older than Susan. 3years ago, becca was 9 less than 3times Susan's age. how old is Greg now?​

Answer 1

Answer:

Greg is 24 years old.

Step-by-step explanation:

Assume that Becca = b, Susan = s, and Greg = g

Set up a system of equations.

b = 2s, g = s + 9, (b - 3) = 3(s - 3) - 9

You can factor the third one out to be b = 3s - 15.

Substitute it in the first one to be 3s - 15 = 2s

Solve: s = 15

Substitute s in the second equation and solve.

g = 15 + 9

g = 24