2x+21=55

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Solution for 2x+21=55 equation: 



2x+21=55

We move all terms to the left:

2x+21-(55)=0

We add all the numbers together, and all the variables

2x-34=0

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

2x=34

x=34/2

x=17

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