-19a+8=20-20a

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Solution for -19a+8=20-20a equation: 



-19a+8=20-20a

We move all terms to the left:

-19a+8-(20-20a)=0

We add all the numbers together, and all the variables

-19a-(-20a+20)+8=0

We get rid of parentheses

-19a+20a-20+8=0

We add all the numbers together, and all the variables

a-12=0

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

a=12

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