The Purplemath Forums

Hey, I am having alot of with mixture problems, and I was wondering if anyone could help me with them.

Thanks, iceking

Thanks!

Hey, I am having alot of trouble with the Addition Property of Equality. I really don't get it at all. Can Some one help?

Thanks, iceking

Hey, I know how to solve equations with variables, but not when they involve fractions. I have a problem like this: R= I need to "Solve for B". How would I do that? Please reply as soon as possible.

Thanks, iceking

How did you put the button in there?

The steps for solving equations with fractions are the same as for solving equations without. Where are you getting stuck? Note: Since this "fraction" is of the form "divided by one", you can ignore the denominator and simply solve "R = x(A + B)" in the usual manner . ...

Work with the algebra, and see which of the answer-options matches your answer. The only difference is one of formatting: they did the addition/subtraction to isolate the B-term first, whereas you went the (usually harder) route of doing the multiplication/division first. But your answer does match...

stapel_eliz wrote:

iceking wrote:How did you put the button in there?

If you're referring to the "Spoiler" button, this is done by clicking on the "spoiler" formatting option in the message-entry box.

Cool! Thanks!

Thanks for all your help!

I have a definition for "functions" in my math book, but I don't understand it. The definition is "a relation in which each first coordinate is paired with exactly one second coordinate" Can someone explain it?