SOLUTION: The weight of a bottle with its cap is 104 g. The bottle is 100 g heavier than the cap. How much does the cap weigh?

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Question 1085495: The weight of a bottle with its cap is 104 g. The bottle is 100 g heavier than the cap.
How much does the cap weigh?
Found 2 solutions by Fombitz, ikleyn:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
B%2BC=104
B=100%2BC
Substituting,
%28100%2BC%29%2BC=104
2C%2B100=104
Solve for C then use either equation to solve for B.

Answer by ikleyn(52775) About Me  (Show Source):
You can put this solution on YOUR website!
.
B + C = 104,   (1)
B - C = 100.   (2)
---------------------------- Add equations (1) and (2) and see what will happen.