Respuesta :

Plasmataco
27)
2(a-4)=2a-8
4a-(2a+4)=4a-2a-4=2a-4
2a-8 is not equal to 2a-4
31
-6a+3
-3(2a-1)=-3*2a-(-3)(1)=-6x+3
-6a+3=-6a+3 so it's an identity
27.  2(a - 4) = 4a - (2a + 4)

      2a - 8 = 2a - 4

this is impossible so No solution.

31.    -6a + 3 =  - 3(2a - 1)
         -6a + 3  =   -6a + 3

Both sides are identical so this is an Identity.

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