Ma7ggiebearonya Ma7ggiebearonya

01-10-2016
Mathematics

contestada

Which has an identity
a. 8 - (5x 2) = -5x - 6
b. 7z 10 - 2 = 8z - 2 (z - 5)
c. 8m - 4 = 5m 8 - m
d. 6y 5 = 6y - 5?

Respuesta :

nobillionaireNobley nobillionaireNobley

09-10-2016

7z + 10 - z = 8z - 2(z - 5)
6z + 10 = 8z - 2z + 10
6z + 10 = 6z + 10
0 = 0

Therefore, option b has an identity.

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