Question

tell which property of equality was used.
85 = 31 + 6y
85 - 31 = (31 + 6y) - 31
choose the correct answer below.
○ addition property of equality
○ subtraction property of equality
○ division property of equality
○ multiplication property of equality

Explanation:

The Subtraction Property of Equality states that if we subtract the same number from both sides of an equation, the two sides remain equal. In the given equation \(85 = 31 + 6y\), we subtracted 31 from both sides to get \(85 - 31=(31 + 6y)-31\), which follows the Subtraction Property of Equality. The other properties do not apply here: the Addition Property involves adding the same number, Division involves dividing by the same non - zero number, and Multiplication involves multiplying by the same number.

Answer:

B. Subtraction Property of Equality