Question

7x-11y = 3; -5x+6y=-4 solve the equation ​

Answer 1

Answer:

Let , 7x - 11y = 3 .......... (I)

and -5x + 6y = -4..........(ii)

Now, multiple equation (I) by 5 and equation

(ii) by 7

5 [ 7x - 11y = 3 ] ...(I) and 7 [ -5x + 6y = -4 ]

= 35x - 55y = 15 .....(I) and = -35x + 42y= -28....(ki)

Then , add both equation

35x - 55y = 15

-35x + 42y = -28

—–———–—·—––—·–

0x. - 13y. = - 13

—·–––––—––———–

= -13y = -13

y = 1 ans.........

Now, pit the Value of y in equation (I)

7x - 11* 1 = 3

7x = 3 +11

7x = 14

x = 2 ans.......

I hope it will help you........