7(x+1)=217(x+1)=21

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Solution for 7(x+1)=217(x+1)=21 equation: 



7(x+1)=217(x+1)=21

We move all terms to the left:

7(x+1)-(217(x+1))=0

We multiply parentheses

7x-(217(x+1))+7=0



We calculate terms in parentheses: -(217(x+1)), so:

217(x+1)

We multiply parentheses

217x+217

Back to the equation:

-(217x+217)



We get rid of parentheses

7x-217x-217+7=0

We add all the numbers together, and all the variables

-210x-210=0

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

-210x=210

x=210/-210

x=-1

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