Question

1) For 4x+5y=10 and 5x+4y= 17 find x+y​

Answer 1

Answer:

ANSWER

4x+5y=10 .....(1)

5x+4y=17 .......(2)

Adding (1) and (2). we get

9x+9y=27

⇒x+y=3 ......(3)

Now, subtracting (1) from (2). we get,

x−y=7 .......(4)

Adding (3) and (4). we get

2x=10

⇒x=5

Now, subtracting (3) from (4). we get,

−2y=4

⇒y=−2

I hope it is helpful to you