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## Homework Statement

i am doing homework about linear equations, i am just asking if i am ok, whith my selection

the question is: from the next equations, which ones are line equations, in x1,x2 and x3?

## Homework Equations

## The Attempt at a Solution

the next are line; a,c,f

the next arent line; b,d,e

correct me if i am wrong please[/B]