Question 166073
I will do question only.

(2) Erin's age is 3 times Warren's. In 4 years she will be twice as old as he will be. How old is each now.

I will do question (2) first.

Warren's age now is x.

Erin's age now is 3x.

In 4 years, they both will be 4 years older, right?

3x + 4 = Erin's age 4 years form now.

x + 4 = Warren's age 4 years from now.

3x + 4 = 2(x + 4)

3x + 4 = 2x + 8

3x - 2x = 8 - 4

x = 4

Warren is 4 years old now.

Erin is 3(4) years old now or 12 years old.

Did you follow?

For question (1), you are dealing with two equations in two variables.