Question

Use the substitution method to solve the system of equations

y=-8x
4x-y=3
a) (1/2,-1)
b) (1/4,-2)
c) (1/2,-4)
d) (1/4,-4)

Answer 1

B i think

Explanation:

Answer 2

x=1/4

y = -2

(1/4, -2)

b

Explanation:

4x -y =3

y =-8x

substitute y =-8x into the first equation. Everywhere you see y put 8x

4x -y =3

4x - (-8x) =3

4x+8x=3

combine like terms

12x = 3

divide by 12

12x/12x = 3 /12

x = 1/4

now we need to find y

y = -8x

y = -8 * 1/4

y = -2