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2(0.50k+3)=-4
We move all terms to the left:
2(0.50k+3)-(-4)=0
We add all the numbers together, and all the variables
2(0.50k+3)+4=0
We multiply parentheses
0k+6+4=0
We add all the numbers together, and all the variables
k+10=0
We move all terms containing k to the left, all other terms to the right
k=-10
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