20+4=7+a

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Solution for 20+4=7+a equation: 



20+4=7+a

We move all terms to the left:

20+4-(7+a)=0

We add all the numbers together, and all the variables

-(a+7)+20+4=0

We add all the numbers together, and all the variables

-(a+7)+24=0

We get rid of parentheses

-a-7+24=0

We add all the numbers together, and all the variables

-1a+17=0

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

-a=-17

a=-17/-1

a=+17

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