Question

How do you solve x+y=4 and x-y=2?

Answer 1

By arranging the equations. `x=3` and `y=1`

Explanation:

`x + y = 4`

`x-y = 2`

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Sum these up:

`2x = 6`

`x=6/2 = 3`

Use the first original equation to find y:

`x+y= 4`

`3+y = 4`

`y= 4-3`

`y=1`