4-2a=18

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Solution for 4-2a=18 equation: 



4-2a=18

We move all terms to the left:

4-2a-(18)=0

We add all the numbers together, and all the variables

-2a-14=0

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

-2a=14

a=14/-2

a=-7

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