Question

answer of 1st question

Answer 1

Dear friend,
Here's your answer...
I) x + y = 6
x + y - 6 = 0......(i)
x - y = 5
x - y - 5 = 0......(ii)
Adding eqn. (i) and (ii) ,
x + y - 6 + x - y - 5 = 0
2x - 11 = 0
2x = 11
x = 11/2
Now, putting value of x in eqn. (i),
x + y - 6 = 0
11/2 + y = 6
y = 6 - 11/2
y = 1 / 2
Hope it helps you !!