5x=(x+42)2

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Solution for 5x=(x+42)2 equation: 



5x=(x+42)2

We move all terms to the left:

5x-((x+42)2)=0



We calculate terms in parentheses: -((x+42)2), so:

(x+42)2

We multiply parentheses

2x+84

Back to the equation:

-(2x+84)



We get rid of parentheses

5x-2x-84=0

We add all the numbers together, and all the variables

3x-84=0

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

3x=84

x=84/3

x=28

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