216=3x+21

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Solution for 216=3x+21 equation: 



216=3x+21

We move all terms to the left:

216-(3x+21)=0

We get rid of parentheses

-3x-21+216=0

We add all the numbers together, and all the variables

-3x+195=0

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

-3x=-195

x=-195/-3

x=+65

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