x+21+x=180

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Solution for x+21+x=180 equation: 



x+21+x=180

We move all terms to the left:

x+21+x-(180)=0

We add all the numbers together, and all the variables

2x-159=0

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

2x=159

x=159/2

x=79+1/2

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