Algebraic Ages
1)
Amy is a years old.
Zack is 7 years older than Amy.
Using a, write an expression for Zack's age.

2)
Bill is b years old.
Vicky is 4 times Bill's age.
Write an expression for Vicky's age.

3)
oo
Cathy is c years old.
Trey is 12 years younger than Cathy.
Write an expression for Trey's age.