(4+x)2=20

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Solution for (4+x)2=20 equation: 



(4+x)2=20

We move all terms to the left:

(4+x)2-(20)=0

We add all the numbers together, and all the variables

(x+4)2-20=0

We multiply parentheses

2x+8-20=0

We add all the numbers together, and all the variables

2x-12=0

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

2x=12

x=12/2

x=6

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