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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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