SOLUTION: If c+d=12 and c*2 - d*2 = 48,then c - d = ______.

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Question 1062711: If c+d=12 and c*2 - d*2 = 48,then c - d = ______.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
You wrote c*2 - d*2 = 48 which I'm assuming you meant to say c^2 - d^2 = 48

The ^ symbol means exponent

If that's the case, then you use the difference of squares rule to get

c^2 - d^2 = 48
(c+d)(c-d) = 48
12(c-d) = 48
12(c-d)/12 = 48/12
c-d = 4

The final answer is 4.