00:01
We know that this person has 14 coins made up of nickel or dimes and quarters.
00:06
So i'm going to use two variables, d for the number of dimes, and then i will use q for the number of quarters.
00:14
So we're trying to figure out how many of each type we have.
00:18
Well, we know that the number of dimes plus the number of quarters has to be equal to 14.
00:23
Then we know that the amount of dimes and quarters, which is the 10 cents to 25 cents adds up to $1 .70.
00:30
So 0 .10 dimes plus 0 .25 quarters is going to equal to $170.
00:38
So again, we're choosing 0 .25 and 0 .1 because that's how much a dime would be worth and a quarter be worth.
00:43
So one thing you can do is instead of using 0 .10 and 0 .25 and 1 .70 is you can essentially multiply everything through by 10.
00:52
So you can have, or 100, 10d plus 25 q is equal to 170.
00:58
And that might be easier than working with a decimal...