Mathematics, 26.06.2019 04:30, idontknow1993
Can someone explain to me this answer i’ll give u 10-25 points
Answers: 1
we have:
, 
and 
. We then have:![(7-x)-5 = [7+(-x)]+(-5) = (a+b)+c.](/tpl/images/0018/2187/012e4.png)
![(a+b)+c = a+(b+c) = 7 + [-x + (-5)] = 7 - x - 5 = 7-(x+5).](/tpl/images/0018/2187/50dc4.png)
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