30=-3x-7x

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Solution for 30=-3x-7x equation: 



30=-3x-7x

We move all terms to the left:

30-(-3x-7x)=0

We add all the numbers together, and all the variables

-(-10x)+30=0

We get rid of parentheses

10x+30=0

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

10x=-30

x=-30/10

x=-3

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