(3+x)4=-12

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Solution for (3+x)4=-12 equation: 



(3+x)4=-12

We move all terms to the left:

(3+x)4-(-12)=0

We add all the numbers together, and all the variables

(x+3)4-(-12)=0

We add all the numbers together, and all the variables

(x+3)4+12=0

We multiply parentheses

4x+12+12=0

We add all the numbers together, and all the variables

4x+24=0

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

4x=-24

x=-24/4

x=-6

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