7(x-5)-7=21

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



7(x-5)-7=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

7(x-5)-28=0

We multiply parentheses

7x-35-28=0

We add all the numbers together, and all the variables

7x-63=0

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

7x=63

x=63/7

x=9

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