15-4(a-1)=27

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Solution for 15-4(a-1)=27 equation: 



15-4(a-1)=27

We move all terms to the left:

15-4(a-1)-(27)=0

We add all the numbers together, and all the variables

-4(a-1)-12=0

We multiply parentheses

-4a+4-12=0

We add all the numbers together, and all the variables

-4a-8=0

We move all terms containing a to the left, all other terms to the right

-4a=8

a=8/-4

a=-2

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