Question

x+2y=4 ;3x-2y=8 then find x+y
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Answer 1

x + 2y = 4

Let it be equation 1

3x - 2y = 8

Let it be equation 2

therefore equation 2 + 1 ,

3x - 2y + x + 2y = 4 + 8

3x + x = 12

4x = 12

x = 12/4

x = 3

To find y let substitute the value of x in equation 1 ,

3 + 2y = 4

2y = 1

y = 1/2

x + y

= 3 + 1/2

= 6/2 + 1/2

= 7/2

Answer is 7/2

hope it helps you .

Answer 2

Answer:

x+2y=4

3x-2y=8

x=2

y=1