-40+7k=k-2k

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Solution for -40+7k=k-2k equation: 



-40+7k=k-2k

We move all terms to the left:

-40+7k-(k-2k)=0

We add all the numbers together, and all the variables

7k-(-1k)-40=0

We get rid of parentheses

7k+1k-40=0

We add all the numbers together, and all the variables

8k-40=0

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

8k=40

k=40/8

k=5

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