Question

х+у= 7, 3х – у = 1 by substituting method​

Answer 1

Answer:

from x+y=7

x=7-y

putting value of x in 3x-y=1

3(7-y)-y=1

21-3y-y=1

21-4y=1

-4y=1-21

-4y=-20

y=5

x=7-y=7-5

x= 2