45+72+3u=180

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Solution for 45+72+3u=180 equation: 



45+72+3u=180

We move all terms to the left:

45+72+3u-(180)=0

We add all the numbers together, and all the variables

3u-63=0

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

3u=63

u=63/3

u=21

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