Question

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

Answer 1

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}