12+(7+x)=30

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Solution for 12+(7+x)=30 equation: 



12+(7+x)=30

We move all terms to the left:

12+(7+x)-(30)=0

We add all the numbers together, and all the variables

(x+7)+12-30=0

We add all the numbers together, and all the variables

(x+7)-18=0

We get rid of parentheses

x+7-18=0

We add all the numbers together, and all the variables

x-11=0

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

x=11

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