Question

the solution of simultanious equation 11x+10y=21 ;10x+11y=21​

Answer 1

Step-by-step explanation:

Given equation 10x+11y=21

(i)10x+11y=21

If y=1 put in equation we get

10x+11×1=25

⇒10x+11=21

⇒10x=21−11=10

⇒x=1

(1,1)

(ii)10x+11y=21

If y=2 put in equation we get

10x+11×2=21

⇒10x+22=21

⇒10x=21−22=−1

⇒x=10−1

(10−1,2)

(iii)10x+11y=21

If y=3 put in equation we get

10x+11×3=21

⇒10x+33=21

⇒10x=21−33=−12

⇒x=10−12

(10−12,3)

Answer 2

Answer:

10x+11y=11x+10y. (21)

10x-11x=11y-10y

-x=-y