Question

Diego solved an equation by multiplying both sides of the equation by 6. Then he checked that 6 is the correct solution by substituting it back into the original equation. Which of the following gives the properties of equality that he used and their correct order?
substitution property of equality and multiplication property of equality
multiplication property of equality and addition property of equality
multiplication property of equality and substitution property of equality
transitive property of equality and substitution property of equality

Answer 1

Based on the given condition Diego utilized, it can be said that he used multiplication property when he multiplied both sides of the equation by 6 and then substitution property when he substituted 6 to the original equation.
(c) Multiplication property of equality and substitution property of equality