Question

if 3x +5y=9 and 5x+3y=7'then what is the value of x+y?

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Answer 1

Answer:

If 3x +5y=9 and 5x+3y=7, then the value of x + y is 2.

Step-by-step explanation:

Given: 3x +5y=9 and 5x+3y=7

Find the value of x + y.

Steps:

3x + 5y = 9 ---- (1)

5x + 3y = 7 ------ (2)

Add (1) and (2)

   3x + 5y = 9  

+ 5x + 3y = 7

__________

 8x + 8y = 16

8x + 8y =16

divide by 8

x + y = 2

So, the value of x + 2 is 2.

Answer 2

Given: 3x+5y = 9

            5x+3y = 7

To find: value of x+y

Step-by-step explanation:

3x+5y = 9    ...(1)

5x+3y = 7    ....(2)

adding both the equations,

8x+8y = 16

8(x+y) = 16

(x+y) = 16/8

        = 2

Answer: value of x+y = 2