Question

Solve x+2y=1 and x-2y=7 by using substitution method​

Answer 1

Step-by-step explanation:

x+2y=7

x = 7 - 2y

subtitute the value in another equation

(7-2y)-2y=1

7-4y=1

7-1=4y

6=4y

y=6/4=3/2

now the value of y need to subtituted in first eq

x+2(3/2)=7

x + 3=7

x=4

sorry if any mistake

Answer 2

Answer:

x+2y=1___(1)

x-2y=7_____(2)

_______

2x=8

x=4

from equation 1

4+2y=1

y=-3/2