The set of possible values of n is {-2, 1; 4).

What is the set of possible values of m if

3m = n-7?

How do I solve it

Replace n in the equation with each given value and solve for m.

You are given n = {-2, 1, 4}

When n = - 2:

3m = - 2-7

3m = - 9

m = - 9/3

m = - 3

When n = 1:

3m = 1-7

3m = - 6

m = - 6 / 3

m=-2

When n = 4:

3m = 4-7

3m = - 3

m = - 3/3

m = - 1

m = {-3, - 2, - 1}