SOLUTION: Why do you think variables are useful in algebra

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Question 40719: Why do you think variables are useful in algebra
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
THINK OF THE UNKNOWN (TYPICALLY X)AS AN OBJECT. EXAMPLE: 12 EGGS COST $1.20
THE EXPRESSION TO FIND THE PRICE OF AN EGG IS 12E=1.20 OR E=1.20/12 OR E=.10
MANY OF THESE SIMPLE PROBLEMS CAN BE SOLVED WITHOUT PENCIL & PAPER.
HOWEVER YOU NEED TO KNOW HOW TO SOLVE THEM WITH PENCIL & PAPER BECAUSE THERE ARE TOO MANY THAT THE MIND CAN'T HANDLE AND IF YOU MAKE A MISTAKE IT IS DIFFICULT TO FIND THE ERROR. ON PAPER YOU MIGHT FIND THE ERROR.