Question

x+y =7 ,3x-y =1
use substation method​

Answer 1

Step-by-step explanation:

x+y=7-----(1)

x=7-y

3x-y=1-----(2)

substituting x=7-y in equation 2,

3 (7-y )-y=1

21-3y-y=1

-4y= -20

y=5

substituting y=5 in equation (1 ),

x+5=7

x=2

Answer 2

Answer:

Step-by-step explanation:

x+y=7...(1)

3x-y=1...(2)

from (1)

y=7-x

substitute in (2)

3x- 7+x =1

4x-7=1

4x=1+7

x=8/4

x=2

x+y=7(from 1)

x=2

2+y=7

y=5