51-7x=20x-21

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Solution for 51-7x=20x-21 equation: 



51-7x=20x-21

We move all terms to the left:

51-7x-(20x-21)=0

We get rid of parentheses

-7x-20x+21+51=0

We add all the numbers together, and all the variables

-27x+72=0

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

-27x=-72

x=-72/-27

x=2+2/3

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