3x+11=x+21=180

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Solution for 3x+11=x+21=180 equation: 



3x+11=x+21=180

We move all terms to the left:

3x+11-(x+21)=0

We get rid of parentheses

3x-x-21+11=0

We add all the numbers together, and all the variables

2x-10=0

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

2x=10

x=10/2

x=5

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