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Mathematics 24 Online
OpenStudy (anonymous):

7 - x = 7

geerky42 (geerky42):

Start by subtracting both sides by 7.

OpenStudy (anonymous):

start by thinking what number would you subtract from seven to get seven?

OpenStudy (anonymous):

0 duh

geerky42 (geerky42):

Just because it is obvious to us, it doesn't mean it is obvious to everyone.

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