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-130=-10+8k
We move all terms to the left:
-130-(-10+8k)=0
We add all the numbers together, and all the variables
-(8k-10)-130=0
We get rid of parentheses
-8k+10-130=0
We add all the numbers together, and all the variables
-8k-120=0
We move all terms containing k to the left, all other terms to the right
-8k=120
k=120/-8
k=-15
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