Asked by vanessa

Share $100 between Joseph and Peter so that Joseph has 3 times as much as Peter.

Answers

Answered by Marth
Let x = the amount of money that Peter has. Now try to set up the equation to solve for x.
Answered by vanessa
sorry i don't understand
Answered by Marth
You want to solve for the amount of money that Peter has. So you let your variable equal that amount of money.

Now, you know that Peter's money + Joseph's money = $100.

Can you express the amount of money Joseph has in terms of x, the amount of money Peter has?
Answered by vanessa
so altogether the have $100. Joseph has 3 time more then Peter. would joseph have $75 and Peter have $15 ?
Answered by Marth
I believe you mean that Peter has $25, which would be correct.

Could you write the equation you used to solve that?
Answered by vanessa
ohyes sorry i meant that.
3/4 of 100 is 75
so the rest is 25
Answered by Marth
Again, where is your variable (x) in the equation?

You should have an equation that looks like the following:

"Peter's money + Joseph's money = $100"
x + J(x) = $100

where J(x) is a (simple) function expressing Joseph's money in terms of x.

The reason I ask is not to make it hard now, but because you will encounter problems that cannot be solved mentally - multiple variable problems, for example. You will need to be able to set up an equation from the word problem.
Answered by vanessa
Oh. ook ... thank you for your help
Answered by wendy
alex spent 3/7 of his money. he give 1/4 of the reminder to his sister. he had $120
left. how much money did he have in the begining
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