3k+5k=-80

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Solution for 3k+5k=-80 equation: 



3k+5k=-80

We move all terms to the left:

3k+5k-(-80)=0

We add all the numbers together, and all the variables

8k+80=0

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

8k=-80

k=-80/8

k=-10

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