(5+2+x)3=30

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Solution for (5+2+x)3=30 equation: 



(5+2+x)3=30

We move all terms to the left:

(5+2+x)3-(30)=0

We add all the numbers together, and all the variables

(x+7)3-30=0

We multiply parentheses

3x+21-30=0

We add all the numbers together, and all the variables

3x-9=0

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

3x=9

x=9/3

x=3

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