Question

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 HELP

Answer 1

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