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-9k+3=-(7-k)
We move all terms to the left:
-9k+3-(-(7-k))=0
We add all the numbers together, and all the variables
-9k-(-(-1k+7))+3=0
We calculate terms in parentheses: -(-(-1k+7)), so:We get rid of parentheses
-(-1k+7)
We get rid of parentheses
1k-7
We add all the numbers together, and all the variables
k-7
Back to the equation:
-(k-7)
-9k-k+7+3=0
We add all the numbers together, and all the variables
-10k+10=0
We move all terms containing k to the left, all other terms to the right
-10k=-10
k=-10/-10
k=1
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