2x-45=21.

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Solution for 2x-45=21. equation: 



2x-45=21.

We move all terms to the left:

2x-45-(21.)=0

We add all the numbers together, and all the variables

2x-45-21=0

We add all the numbers together, and all the variables

2x-66=0

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

2x=66

x=66/2

x=33

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