deadriane29 deadriane29

28-10-2019
Mathematics

contestada

solve the equation -7(3-a+1)=-21

Respuesta :

nuhasadullah nuhasadullah

28-10-2019

Answer:

a = 1

Step-by-step explanation:

-7 (3-a+1) = -21

-21 + 7a -7 = -21

7a -7 = -21 +21

7a -7 = 0

7a = 7

a = 7/7

a = 1

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