-18=2-4a

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Solution for -18=2-4a equation: 



-18=2-4a

We move all terms to the left:

-18-(2-4a)=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-20=0

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

4a=20

a=20/4

a=5

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