5x-51=21-7x

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Solution for 5x-51=21-7x equation: 



5x-51=21-7x

We move all terms to the left:

5x-51-(21-7x)=0

We add all the numbers together, and all the variables

5x-(-7x+21)-51=0

We get rid of parentheses

5x+7x-21-51=0

We add all the numbers together, and all the variables

12x-72=0

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

12x=72

x=72/12

x=6

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