Question

Solve for x:

4x + 12 = 8 (given)

4x = -4 (subtraction)

x = -1

What is the reason for the last step in the argument?

Answer 1

Explanation:

4x + 12 = 8 ➡ 4x = 8-12 ➡ 4x = -4 ➡ x = -1

because a negative number divided by a positive number is equal to a negative number.