# math,algebra

what is the difference and similarities
if solving an equation with varibles in the equation if it had 1 or 2 or even 3 variables?

Here is one:

Money left in Wallet= money earned + money found - money lost - money spent.

I don't understand? can you please explain...

1. Cindy spends 20% of the money that she has on groceries.

She has a total of \$30.

How much money did she spend on groceries?

posted by angie
2. 20% of \$30
=30 * 1/5
= \$6

posted by Ellie

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