15-(x-7)=21

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Solution for 15-(x-7)=21 equation: 



15-(x-7)=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(x-7)-6=0

We get rid of parentheses

-x+7-6=0

We add all the numbers together, and all the variables

-1x+1=0

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

-x=-1

x=-1/-1

x=1

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