4+a=13*

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Solution for 4+a=13* equation: 



4+a=13*

We move all terms to the left:

4+a-(13*)=0

We add all the numbers together, and all the variables

a+4-0=0

We add all the numbers together, and all the variables

a+4=0

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

a=-4

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