Which property justifies this statement? if 4x=20, then x=5. a . subtraction property of equality b . division property of equality c . reflexive property of equality d . substitution property of equality

The correct answer is:

B . Division Property of Equality

Explanation:

The original equation is 4x = 20.  To solve this, we would cancel the 4.  Since the variable, x, has been multiplied by 4, we cancel it by dividing:

4x/4 = 20/4

x = 5

This is the division property of equality; we can divide both sides of an equation by the same number and preserve equality.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

the answer is b