Posted by Chitra on Friday, November 27, 2009 at 8:45pm.
On one side of a scale there are 6 coins, 3
weighing 2 grams each and 3 weighing x grams
each. The scale is balanced if 5 coins weighing
x grams each are placed on the other side of
the scale.
How much does each of the unknown coins
weigh?
Answer in units of gram

Geometry  the helper, Saturday, November 28, 2009 at 2:37pm
3 grams. If you make the equation
3(2)+3x=5x
then simplify to
6+3x=5x
Then move
6=5x3x
then simplify
6=2x
then answer
6/2=3
x=3