5x+6=x+21

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Solution for 5x+6=x+21 equation: 



5x+6=x+21

We move all terms to the left:

5x+6-(x+21)=0

We get rid of parentheses

5x-x-21+6=0

We add all the numbers together, and all the variables

4x-15=0

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

4x=15

x=15/4

x=3+3/4

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