100(1-x)=-10(7+9x)

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Solution for 100(1-x)=-10(7+9x) equation: 



100(1-x)=-10(7+9x)

We move all terms to the left:

100(1-x)-(-10(7+9x))=0

We add all the numbers together, and all the variables

100(-1x+1)-(-10(9x+7))=0

We multiply parentheses

-100x-(-10(9x+7))+100=0



We calculate terms in parentheses: -(-10(9x+7)), so:

-10(9x+7)

We multiply parentheses

-90x-70

Back to the equation:

-(-90x-70)



We get rid of parentheses

-100x+90x+70+100=0

We add all the numbers together, and all the variables

-10x+170=0

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

-10x=-170

x=-170/-10

x=+17

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