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Mathematics 19 Online
Pixel:

http://prntscr.com/hgg6pi

Pixel:

@Vocaloid @AngeI @Rainluke01

pooja195:

Any ideas?

Pixel:

no

Pixel:

@pooja195

Rainluke01:

it would be the second one down because if you put a one in place of the letter you get 81. so you just place one in all four equations and what ever one comes out to be true is the answer

Rainluke01:

does this make sense

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