Question

ans all the queations those are given below

Answer 1

Answer:

in first x= 2& y= 5

in second x= 0 y= 6

in third

u will do urself

Explanation:

By substitution method

x+y= 7

x= 7-y............(i)

now,

3x-y=1

3(7-y)-y=1

21-3y-y=1

-4y= 1-21

-4y=-20

y=5

Put the value of y in eqn I

x= 7-5

x=2

plz mark me as brainliest