7x-3(4-5x)=30+x

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Solution for 7x-3(4-5x)=30+x equation: 



7x-3(4-5x)=30+x

We move all terms to the left:

7x-3(4-5x)-(30+x)=0

We add all the numbers together, and all the variables

7x-3(-5x+4)-(x+30)=0

We multiply parentheses

7x+15x-(x+30)-12=0

We get rid of parentheses

7x+15x-x-30-12=0

We add all the numbers together, and all the variables

21x-42=0

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

21x=42

x=42/21

x=2

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