Question

Consider the system of equations.

5x+4y=−2
2x−4y=6

Which property could be used to write the equation 7x = 4 as the first step to solving the system of equations?

A. Substitution Property of Equality
B. Addition Property of Equality
C. Division Property of Equality
D. Distributive Property of Equality

Answer 1

Like the person said beforehand B. You have no need to multiply anything since you already have +4y and -4y so you go on ahead and add the problems. Just thought you may want an explanation 

Answer 2

THat would be B
Addition Property of EQuality