(400+x)4=8100-x

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Solution for (400+x)4=8100-x equation: 



(400+x)4=8100-x

We move all terms to the left:

(400+x)4-(8100-x)=0

We add all the numbers together, and all the variables

(x+400)4-(-1x+8100)=0

We multiply parentheses

4x-(-1x+8100)+1600=0

We get rid of parentheses

4x+1x-8100+1600=0

We add all the numbers together, and all the variables

5x-6500=0

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

5x=6500

x=6500/5

x=1300

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