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-201=0

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

2X=201

X=201/2

X=100+1/2

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