5=a+8+1

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Solution for 5=a+8+1 equation: 



5=a+8+1

We move all terms to the left:

5-(a+8+1)=0

We add all the numbers together, and all the variables

-(a+9)+5=0

We get rid of parentheses

-a-9+5=0

We add all the numbers together, and all the variables

-1a-4=0

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

-a=4

a=4/-1

a=-4

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