18x-45=12x+21

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Solution for 18x-45=12x+21 equation: 



18x-45=12x+21

We move all terms to the left:

18x-45-(12x+21)=0

We get rid of parentheses

18x-12x-21-45=0

We add all the numbers together, and all the variables

6x-66=0

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

6x=66

x=66/6

x=11

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