Question

3x - 5y – 4 = 0 ; 9x = 2y + 7 ​

Answer 1

(3x -5y=4)×2

(9x-2y= 7)×5

6x-10y=8

45-10y= 35

now , subtract.

so , we get

39x= 27

x = 27/39 = 9/13

so , y = -5/13 ans.

Answer 2

3x - 5y = 4 -> (1).
9x - 2y = 7 -> (2).
9x - 15y = 12 -> ( on multiplying whole equation by 3)
Now subtract.

So we get: 13y = -5.
Therefore y = -5/13.

Now x = 7 + -10/13 = 91-10/13 ( lcm )

Hence x = 81/13.

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