Answer: b = -6
Explanation:
The property of equality used in the equation -3b = 18 is the Multiplicative Inverse Property or the Division Property of Equality.
According to the Division Property of Equality, if we divide both sides of an equation by the same non-zero number, the equality is still maintained. In this case, we can divide both sides of the equation by -3 to solve for the variable b:
-3b / -3 = 18 / -3
b = -6
By dividing both sides of the equation by -3, we find that b is equal to -6.