Question

What is the solution of the system? Use substitution.

x = –2y + 10
–6y = 6x – 6
z = –3x + 10y
A. x = 9, y = –8, z = 114

B. x = –8, y = 9, z = 114

C. x = –8, y = 114, z = 9

D. x = 114, y = 9, z = –8

Answer 1

x = –2y + 10
–6y = 6x – 6

x is -2y + 10
By using the substitution method
-6y = 6(-2y+10) -6
-6y = -12y+60-6
-6y = -12y + 54
-6y - -12y = 54
-6y + 12y = 54
6y = 54
y = 9

Then
if y = 9

x = –2y + 10
x = -2(9)+10
x = -18 + 10
x = -8

Now you have the value of x and y, can find the z?

Answer 2

c?

Answer 3

no thats not it

Answer 4

i think its B not C

Answer 5

b. x = –8, y = 9, z = 114

Answer 6

that was my next answer thanks

Answer 7

your welcome