-30=10(4-x)

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Solution for -30=10(4-x) equation: 



-30=10(4-x)

We move all terms to the left:

-30-(10(4-x))=0

We add all the numbers together, and all the variables

-(10(-1x+4))-30=0



We calculate terms in parentheses: -(10(-1x+4)), so:

10(-1x+4)

We multiply parentheses

-10x+40

Back to the equation:

-(-10x+40)



We get rid of parentheses

10x-40-30=0

We add all the numbers together, and all the variables

10x-70=0

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

10x=70

x=70/10

x=7

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