10(4-10k)=-10(3k+10)

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Solution for 10(4-10k)=-10(3k+10) equation: 



10(4-10k)=-10(3k+10)

We move all terms to the left:

10(4-10k)-(-10(3k+10))=0

We add all the numbers together, and all the variables

10(-10k+4)-(-10(3k+10))=0

We multiply parentheses

-100k-(-10(3k+10))+40=0



We calculate terms in parentheses: -(-10(3k+10)), so:

-10(3k+10)

We multiply parentheses

-30k-100

Back to the equation:

-(-30k-100)



We get rid of parentheses

-100k+30k+100+40=0

We add all the numbers together, and all the variables

-70k+140=0

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

-70k=-140

k=-140/-70

k=+2

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