-7=7.75(3+10k)-5k

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Solution for -7=7.75(3+10k)-5k equation: 



-7=7.75(3+10k)-5k

We move all terms to the left:

-7-(7.75(3+10k)-5k)=0

We add all the numbers together, and all the variables

-(7.75(10k+3)-5k)-7=0



We calculate terms in parentheses: -(7.75(10k+3)-5k), so:

7.75(10k+3)-5k

We add all the numbers together, and all the variables

-5k+7.75(10k+3)

We multiply parentheses

-5k+77.5k+23.25

We add all the numbers together, and all the variables

72.5k+23.25

Back to the equation:

-(72.5k+23.25)



We get rid of parentheses

-72.5k-23.25-7=0

We add all the numbers together, and all the variables

-72.5k-30.25=0

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

-72.5k=30.25

k=30.25/-72.5

k=-4.84/11.6

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