18=a+5+9

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Solution for 18=a+5+9 equation: 



18=a+5+9

We move all terms to the left:

18-(a+5+9)=0

We add all the numbers together, and all the variables

-(a+14)+18=0

We get rid of parentheses

-a-14+18=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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