7x+5=21x+7

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Solution for 7x+5=21x+7 equation: 



7x+5=21x+7

We move all terms to the left:

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

We get rid of parentheses

7x-21x-7+5=0

We add all the numbers together, and all the variables

-14x-2=0

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

-14x=2

x=2/-14

x=-1/7

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