2(a-1)-5(a+1)=-1

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Solution for 2(a-1)-5(a+1)=-1 equation: 



2(a-1)-5(a+1)=-1

We move all terms to the left:

2(a-1)-5(a+1)-(-1)=0

We add all the numbers together, and all the variables

2(a-1)-5(a+1)+1=0

We multiply parentheses

2a-5a-2-5+1=0

We add all the numbers together, and all the variables

-3a-6=0

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

-3a=6

a=6/-3

a=-2

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