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-7(4+7k)=-224
We move all terms to the left:
-7(4+7k)-(-224)=0
We add all the numbers together, and all the variables
-7(7k+4)-(-224)=0
We add all the numbers together, and all the variables
-7(7k+4)+224=0
We multiply parentheses
-49k-28+224=0
We add all the numbers together, and all the variables
-49k+196=0
We move all terms containing k to the left, all other terms to the right
-49k=-196
k=-196/-49
k=+4
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