Question

5 x - 4 y = - 10 , - 4x + 5 y = 8 x=


y=​

Answer 1

Answer:Required Answer:-

Given:

5x + 4y = 10

4x + 5y = 8

To Find:

x + y = ?

Solution:

We have,

➡ 5x + 4y = 10 . . . . (i)

➡ 4x + 5y = 8 . . . . . (ii)

Adding equations (i) and (ii), we get,

➡ 9x + 9y = 18

Taking 9 as common, we get,

➡ 9(x + y) = 18

➡ x + y = 2

★ Hence, the value of (x + y) is 2.

Answer:

The value of (x + y) is 2

Answer 2

Step-by-step explanation:

x=5y=−2

4x+5y=10

5x+4y=17

Adding (1) and (2). we get

9x+9y=27

⇒x+y=3

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

x−y=7

Adding (3) and (4). we get

2x=10

⇒x=5

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

−2y=4

⇒y=−2

∴x=5,y=−2