00:01
Sherry saves nickels and dimes in a coin purse.
00:04
The total value is 80 cents.
00:13
The number of nickels, so nickels, is two less than seven times the number of dimes.
00:23
How many nickels and how many dimes? okay, so i'm going to let n equal the number of nickels and d equal the number of dimes.
00:33
Nichols are worth five cents, dimes are worth.
00:37
10 cents and together they have to equal 80 cents.
00:43
Then i have my second equation that relates the nickels and dimes to each other.
00:52
I'm going to use substitution.
00:55
So i'm going to go to my first equation and put 7d minus 2 in for n and i'm going to solve.
01:06
So start off by distributing that 0 .05 to what's in parentheses.
01:12
That gives me 0 .35d minus 0 .10 plus .10d equals .80.
01:26
0 .35 plus .10 is .45d...