Pete began solving the system {x+3y=132x−y=−2 by rewriting the system as {x+3y=136x−3y=−6 .
which property justifies this step?
a. addition property of equality
b. subtraction property of equality
c. substitution property of equality
d. multiplication property of equality

Pete used multiplication property of equality

D is correct

Step-by-step explanation:

Pete began solving the system of equation.

x+3y=13

2x-y=-2

Pete re-write the system of equation

x+3y=13

6x-3y=-6

If we see both system of equation.

Equation 1 is same in both case. No change in equation.

Equation 2: 2x-y=-2 changes to 6x-3y=-6

each coefficient of equation changes to 3 times.

So, Pete multiply each term of 2nd equation by 3.

Hence, Pete use multiplication property of equality

is there any photos or whatever?

2425

step-by-step explanation: