-25=-5(1+5k)-(-4k-1)

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Solution for -25=-5(1+5k)-(-4k-1) equation: 



-25=-5(1+5k)-(-4k-1)

We move all terms to the left:

-25-(-5(1+5k)-(-4k-1))=0

We add all the numbers together, and all the variables

-(-5(5k+1)-(-4k-1))-25=0



We calculate terms in parentheses: -(-5(5k+1)-(-4k-1)), so:

-5(5k+1)-(-4k-1)

We multiply parentheses

-25k-(-4k-1)-5

We get rid of parentheses

-25k+4k+1-5

We add all the numbers together, and all the variables

-21k-4

Back to the equation:

-(-21k-4)



We get rid of parentheses

21k+4-25=0

We add all the numbers together, and all the variables

21k-21=0

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

21k=21

k=21/21

k=1

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