7(3x-4)-21=28

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Solution for 7(3x-4)-21=28 equation: 



7(3x-4)-21=28

We move all terms to the left:

7(3x-4)-21-(28)=0

We add all the numbers together, and all the variables

7(3x-4)-49=0

We multiply parentheses

21x-28-49=0

We add all the numbers together, and all the variables

21x-77=0

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

21x=77

x=77/21

x=3+2/3

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