Question

3) Find value of (x + y)

if 3x + 4y = 11 and 4x + 3y = 10​

Answer 1

answer

let 3x+y=11---(1)

4x+3y=10---(2)

adding eq (1) and(2)

3x+4y=11

+4x+3y=10

=7x+7y=21

dividing both side by 7

7x/7+7y/7=21/7

x+y=3

Answer 2

Answer:

The answer is 3

Step-by-step explanation:

Given, 3x + 4y = 11

    4x +3y = 10

Adding  the  we get,

3x + 4x + 4y + 3y = 11 + 10

⇒ 7x + 7y = 21

⇒7(x + y) = 21

⇒ (x + y) = 21/7  = 3