10th grade

posted by jj Saturday, October 30, 2010 at 5:51pm

BC=3x+2 and CD= 5x-10. Solve for x.

1. Jen Sunday, October 31, 2010 at 12:15am

   Does BC=CD? If so,
   3x+2=5x-10
   12=2x
   12/2=x

2. Cindy Tuesday, April 12, 2011 at 4:57pm

   if BC=DC then you would do
   
   3x+2=5x-10
   
   then you do algebra by adding 10 to both sides like this
   3x+2=5x-10
   +10 +10 the 10s cancel out
   ------------
   3x+2=5x
   
   then you subtract 3x from both sides like soo
   
   3x+12=5x
   -3x -3x 3Xs cancel out
   -----------
   12=2x then you divide 2 from both sides
   /2 /2
   
   answer: 6=X

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