Question #14967

1 Answer
sente
Aug 31, 2016

#-2a+7 = 7-2a#

Explanation:

Addition has a property known as commutativity, meaning that for any #x# and #y#, we have #x+y = y+x#.

In this case, if we let #x = -2a# and #y=7#, that property directly shows that the two given expressions are equal:

#(-2a) + 7 = 7 + (-2a) = 7-2a#

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