(8+x)+405=21+8

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Solution for (8+x)+405=21+8 equation: 



(8+x)+405=21+8

We move all terms to the left:

(8+x)+405-(21+8)=0

We add all the numbers together, and all the variables

(x+8)+405-29=0

We add all the numbers together, and all the variables

(x+8)+376=0

We get rid of parentheses

x+8+376=0

We add all the numbers together, and all the variables

x+384=0

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

x=-384

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