Question 631922
x=-1+y...............(1)
23x-7y=-7............(2)
Put the value of x from (1) to (2)
23(-1+y)-7y=-7
-23+23y-7y=-7
23y-7y=-7+23
16y=16
16y/16=16/16
y=1
Put the value of y in (1)
x=-1+1
x=0

x,y=0,1