(87+x)2=90

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Solution for (87+x)2=90 equation: 



(87+x)2=90

We move all terms to the left:

(87+x)2-(90)=0

We add all the numbers together, and all the variables

(x+87)2-90=0

We multiply parentheses

2x+174-90=0

We add all the numbers together, and all the variables

2x+84=0

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

2x=-84

x=-84/2

x=-42

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