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-k+4=-20+2k
We move all terms to the left:
-k+4-(-20+2k)=0
We add all the numbers together, and all the variables
-k-(2k-20)+4=0
We add all the numbers together, and all the variables
-1k-(2k-20)+4=0
We get rid of parentheses
-1k-2k+20+4=0
We add all the numbers together, and all the variables
-3k+24=0
We move all terms containing k to the left, all other terms to the right
-3k=-24
k=-24/-3
k=+8
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