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Systems of Equations Videos 73 videos
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SAT Math 8.2 Algebra and Functions 175 Views
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Description:
SAT Math 8.2 Algebra and Functions
Transcript
- 00:03
Here’s your shmoop du jour, brought to you by simple equations.
- 00:06
Such as…you plus Netflix plus Papa John’s equals a depressing Saturday night.
- 00:14
Five less than six times a number is equal to 20 more than the number. What is the number?
- 00:22
Okay, this is just one of those “turn words into numbers” type problems.
- 00:26
We can’t find our magic scepter at the moment,
Full Transcript
- 00:28
so we’re going to have to do this one manually. We’re told that we’re looking for a mysterious
- 00:34
number…so we’ll just label this variable x.
- 00:36
Five less than six times a number… or 6x minus 5.
- 00:41
20 more than the number is just 20 plus x. So our equation is:
- 00:46
6x - 5 = 20 + x. All right, Combine like terms...
- 00:51
...so divide both sides by 5 and we get x = 5.
- 00:56
And that’s our answer.
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