Write four solutions for each of the following equations:
(i) `2x+y=7`
(ii) `pix+y=9`
(iii) `x=4y`

Explanation

1) 2x+y=7

let x=0 then y=7

let x=1 then y=5

let x=2 then y=3

let x=3 then y=1

2) `pix+y=9`

let x=0 then y=9

let x=1 then y=`9-pi`

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