18=-4a-1+3

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Solution for 18=-4a-1+3 equation: 



18=-4a-1+3

We move all terms to the left:

18-(-4a-1+3)=0

We add all the numbers together, and all the variables

-(-4a+2)+18=0

We get rid of parentheses

4a-2+18=0

We add all the numbers together, and all the variables

4a+16=0

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

4a=-16

a=-16/4

a=-4

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