harleyquinn1241
07.07.2019 •
Mathematics
Which equation is an identity? a. 5m-6=5m+7-m b. 6m-5=7m+5-m c. 10p+6-p=12p-3(p-2) d. 3y+2=3y-2 plz
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Ответ:
The answer is C. 10p+6-p=12p-3(p-2)
because if you substitute any number for p, it will always equal each other
a. 5m-6=5m+7m
5(3)-6=5(3)+7(3)
15-6=15+21
9=36
b. 6(3)-5=7(3)+5-3
18-5=21+5-3
13=23
c. 10(3)+6-3=12(3)-3(3-2)
30+6-3=36-3
33=33
d. 3(3)+2=3(3)-2
9+2=9-2
11=7
Ответ:
Step-by-step explanation:
60.000