Question

How do you solve this system of equations by substitution: x+4y=−14andy=2x−8?

Answer 1

y=2x-8.... (1)

x+4y =-14..... (2)

substututing (1) in (2)

x+4(2x-8) =-14

x+8x-32=-14

9x=18

x=2

Answer 2

Answer:

x=2 and y= - 4

Step-by-step explanation:

x+4y= - 14 ...........(1)

substitute y=2x-8 in equation (1)

x+4(2x-8)= - 14

x=2

substitute x=2 in equation(1)

2+4y= - 14

y= - 4