Question

The point of intersection of lines x+y-1=0 and x-y+1=0 is

(a) (0 , 1) b) (1 , 0) c) (1 , 1) d) (-1 , 0)​

Answer 1

Answer:

Given equations are:

x+y=1

x−y=1

⇒y=−x+1

⇒y=x−1

⇒−x+1=x−1

⇒−2x=−2

⇒x=1

Now putting x=1 in x+y=1

⇒1+y=1

⇒y=0

Hence the intersection point of line is (1,0)