3x-21=36x+45

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Solution for 3x-21=36x+45 equation: 



3x-21=36x+45

We move all terms to the left:

3x-21-(36x+45)=0

We get rid of parentheses

3x-36x-45-21=0

We add all the numbers together, and all the variables

-33x-66=0

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

-33x=66

x=66/-33

x=-2

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