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25-k+2(4-k)=0
We add all the numbers together, and all the variables
-k+2(-1k+4)+25=0
We add all the numbers together, and all the variables
-1k+2(-1k+4)+25=0
We multiply parentheses
-1k-2k+8+25=0
We add all the numbers together, and all the variables
-3k+33=0
We move all terms containing k to the left, all other terms to the right
-3k=-33
k=-33/-3
k=+11
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