3a+7=2a+11=a+12

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Solution for 3a+7=2a+11=a+12 equation: 



3a+7=2a+11=a+12

We move all terms to the left:

3a+7-(2a+11)=0

We get rid of parentheses

3a-2a-11+7=0

We add all the numbers together, and all the variables

a-4=0

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

a=4

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