Question

Y=2x,x+y=9 solve by substitution show work

Answer 1

Hello there here is the problem you gave us

`y=2x,x+y=9`

You want to us to solve this by substitution,

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• 
  `y=2x`

• 
  `x= (1)/(2)y`

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we can substitute
`y` for
`2x` and get the equation

`x+2x=9`, do the simple algebra and we get that
`x=3`, remember though
`y=2x`, plug in the value that
`x=3` and get that
`y=6`

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`{\huge{\boxed{\mathfrak{Answer}}}`

• 
  `x=3`

• 
  `y=6`

Have a good day :) !

Answer 2

(3,6)

Explanation:

y = 2x

x+y = 9

; x+(2x) = 9

3x = 9

x = 3

y = 2x

y = 2(3)

y = 6