Find the solution of this system of equations. Separate the x- and y- with commas. x = -6 + y
and
-7x + 9y = 8

Step-by-step explanation:

-7(-6 + y) + 9y = 8

42 - 7y + 9y = 8

2y + 42 = 8

2y = -34

y = -17

x = -6 - 17

x = -23

(-23, -17)

easy math just plug in a and b

step-by-step explanation:

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer