SOLUTION: How can you do this? -k = 5

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Question 69644This question is from textbook Algebra Concepts and Applications
: How can you do this?
-k = 5 This question is from textbook Algebra Concepts and Applications

Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
CONSIDER THE = SIGN AS A BALANCE BEAM THAT IS PERFECTLY BALANCED. THEREFORE WHATEVER YOU DO TO ONE SIDE YOU MUST DO THE SAME TO THE OTHER SIDE(ADD, SUBTRACT, MULTIPLY, DIVIDE, SQUARE ROOT, SQUARE ETC.).
-K=5 NOW MULTIPLY BOTH SIDES BY -1
(-1)(-K)=(-1)5
K=-5
PROOF
-(-5)=5
5=5