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

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Solution for 7(3-5x)=21-5x equation: 



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

-35x-(-5x+21)+21=0

We get rid of parentheses

-35x+5x-21+21=0

We add all the numbers together, and all the variables

-30x=0

x=0/-30

x=0

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