Use the substitution method to solve the system of equations.

y = 4x

8x + y = 18

A (8

B. (66)

c. (2,8)

D. (2, 2)

The solution set we get is (x, y) { (6/4, 6) } ...

Step-by-step explanation:

We have the system of equation:

y = 4x equation 1

8x + y = 18 equation 2

As we see that the first equation has a value of y. Now plug the value of y which is 4x in 2nd equation:

8x+y=18

8x + (4x) = 18

12x=18

Divide both sides by 12.

12x/12 = 18/12

x = 18/12

x = 6/4

Now plug the value x = 6/4 in equation 1.

y=4x

y=4 (6/4)

4 will be cancelled out by 4

y = 6

The solution set we get is (x, y) { (6/4, 6) } ...