7(4x+7)=21

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



7(4x+7)=21

We move all terms to the left:

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

We multiply parentheses

28x+49-21=0

We add all the numbers together, and all the variables

28x+28=0

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

28x=-28

x=-28/28

x=-1

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