Which property was applied when simplifying this expression from step 2 to step 3?

Multiplicative inverse property

Step-by-step explanation:

By looking at steps 2 and 3, we can see that and were multiplied to make . Whenever terms are multiplied by their reciprocal - in this case, 6 is multiplied by - to get , then the multiplicative inverse property was applied.

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18