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1/2(-4+30)=7+10K
We move all terms to the left:
1/2(-4+30)-(7+10K)=0
We add all the numbers together, and all the variables
-(10K+7)+1/226=0
We get rid of parentheses
-10K-7+1/226=0
We multiply all the terms by the denominator
-10K*226+1-7*226=0
We add all the numbers together, and all the variables
-10K*226-1581=0
Wy multiply elements
-2260K-1581=0
We move all terms containing K to the left, all other terms to the right
-2260K=1581
K=1581/-2260
K=-1581/2260
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