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Mathematics 12 Online
OpenStudy (gabylovesyou):

@blurbendy

OpenStudy (gabylovesyou):

OpenStudy (gabylovesyou):

I think its D

OpenStudy (blurbendy):

Look at Belle's step 4. What looks strange there?

OpenStudy (gabylovesyou):

she shouldve subtracted 9

OpenStudy (blurbendy):

right

OpenStudy (blurbendy):

d is right =)

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