If you could do question 9 I would be so thankful. Use substitution. No one is helping me, please help

step 1. x = 2y - 4 on the 1st equation

step 2. 5(2y- 4) - 6y +18 = 0 plug x from 1st equation into the 2nd equation

step 3. 10y - 20 - 6y + 18 = 0

step 4. 4y - 2 = 0

step 5. y = 1/2

step 6. x = -3 plug y into 1st equation

step 7. (-3, 1/2) is the answer.

-3*(x-2y+4=0)

5x-6y+18=0

-3x+6y-12y=-3

5x-6y+18=0

2x+6=-3

2x=-9

X= -4.5

Step-by-step explanation:

good job you smart son of a gun you are smarter that einstein. 7

i am not sure :

step-by-step explanation: