(x+x)4=-56

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Solution for (x+x)4=-56 equation: 



(x+x)4=-56

We move all terms to the left:

(x+x)4-(-56)=0

We add all the numbers together, and all the variables

(+2x)4-(-56)=0

We add all the numbers together, and all the variables

(+2x)4+56=0

We multiply parentheses

8x+56=0

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

8x=-56

x=-56/8

x=-7

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