4a+36=13a-45.

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Solution for 4a+36=13a-45. equation: 



4a+36=13a-45.

We move all terms to the left:

4a+36-(13a-45.)=0

We add all the numbers together, and all the variables

4a-(13a-45)+36=0

We get rid of parentheses

4a-13a+45+36=0

We add all the numbers together, and all the variables

-9a+81=0

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

-9a=-81

a=-81/-9

a=+9

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