-25=3a+20+a

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Solution for -25=3a+20+a equation: 



-25=3a+20+a

We move all terms to the left:

-25-(3a+20+a)=0

We add all the numbers together, and all the variables

-(4a+20)-25=0

We get rid of parentheses

-4a-20-25=0

We add all the numbers together, and all the variables

-4a-45=0

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

-4a=45

a=45/-4

a=-11+1/4

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