7+3x=5+21x

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Solution for 7+3x=5+21x equation: 



7+3x=5+21x

We move all terms to the left:

7+3x-(5+21x)=0

We add all the numbers together, and all the variables

3x-(21x+5)+7=0

We get rid of parentheses

3x-21x-5+7=0

We add all the numbers together, and all the variables

-18x+2=0

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

-18x=-2

x=-2/-18

x=1/9

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