7(4x-21)=21

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Solution for 7(4x-21)=21 equation: 



7(4x-21)=21

We move all terms to the left:

7(4x-21)-(21)=0

We multiply parentheses

28x-147-21=0

We add all the numbers together, and all the variables

28x-168=0

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

28x=168

x=168/28

x=6

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