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OpenStudy (anonymous):
What's my answer for this and why (7+_)+2=7+(4+2)
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OpenStudy (anonymous):
it would be just like the lst one you did what number is on the other side that is not in (7+_)+2
zepdrix (zepdrix):
The `why` is due to the `Associative Property of Addition`. For the value, look at cody's directions :)
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