3x+21=6x-60*

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Solution for 3x+21=6x-60* equation: 



3x+21=6x-60*

We move all terms to the left:

3x+21-(6x-60*)=0

We add all the numbers together, and all the variables

3x-(+6x)+21=0

We get rid of parentheses

3x-6x+21=0

We add all the numbers together, and all the variables

-3x+21=0

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

-3x=-21

x=-21/-3

x=+7

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