7x-(8x-(5x-30))=12

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Solution for 7x-(8x-(5x-30))=12 equation: 



7x-(8x-(5x-30))=12

We move all terms to the left:

7x-(8x-(5x-30))-(12)=0



We calculate terms in parentheses: -(8x-(5x-30)), so:

8x-(5x-30)

We get rid of parentheses

8x-5x+30

We add all the numbers together, and all the variables

3x+30

Back to the equation:

-(3x+30)



We get rid of parentheses

7x-3x-30-12=0

We add all the numbers together, and all the variables

4x-42=0

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

4x=42

x=42/4

x=10+1/2

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