0:00
All righty.
00:01
For number 68, we're told that we have to find the numbers of two numbers.
00:06
So the first number is just going to be your x or your n or whatever variable you want to use.
00:10
But then it gives us information that the other number is nine less than twice it.
00:14
So two times x, and then whenever you have a nine less than, that means it's minus nine.
00:19
And that goes at the end of your expression.
00:21
Now we're talking about summing again, and that sum means addition.
00:25
And we're going to say it's eight equal to eight.
00:27
So we're going to take that x plus 2x minus 9 and set it equal to 8.
00:33
We're going to end up with 3x combining like terms minus 9 equals 8.
00:39
We'll go ahead and we will add 9 to both sides.
00:44
That's going to give us 3x is equal to 17.
00:49
I'm going to go ahead and divide both sides by 3.
00:52
And since 17 over 3 does not reduce, you can leave it 17 over 3, but it does say fine the numbers...