-40=-4-3k

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Solution for -40=-4-3k equation: 



-40=-4-3k

We move all terms to the left:

-40-(-4-3k)=0

We add all the numbers together, and all the variables

-(-3k-4)-40=0

We get rid of parentheses

3k+4-40=0

We add all the numbers together, and all the variables

3k-36=0

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

3k=36

k=36/3

k=12

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