Explanation:
Hey there!
Here, The equations are:
y = x+1........(i)
4x + y = 6........(ii).
Now,
Putting equation (i) in (ii)
4x + y = 6
4x + (x + 1) = 6
5x + 1 = 6
5x = 6-1

Therefore, x= 1
Putting the value of x in equation (i).
y = x+1
y = 1+1
Therefore the value of y is 2.
Check:
y = x+1
2 = 1+1
2=2 ( True ).
Hope it helps....