3 years ago

1 answer:

koban [17]3 years ago

4 0

hello :

2x+7y=1 ...(*)

y=4x−8...(**)

(4;8) means x= 4 and y= 8

put this values in (*) and(**) :

2(4)+7(8) =1 62=1 false

8=4(4)-8 8=8 true

so :(4;8) is not solution for this system.

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