30+90=(-10x)

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Solution for 30+90=(-10x) equation: 



30+90=(-10x)

We move all terms to the left:

30+90-((-10x))=0

We add all the numbers together, and all the variables

-((-10x))+120=0



We calculate terms in parentheses: -((-10x)), so:

(-10x)

We get rid of parentheses

-10x

Back to the equation:

-(-10x)



We get rid of parentheses

10x+120=0

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

10x=-120

x=-120/10

x=-12

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