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One-Variable Equations and Inequalities Videos 30 videos
You don't want to leave a bunch of unsolved rational equations sitting around.
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SAT Math: Numbers and Operations Drill 1, Problem 2. If the masterpiece will be worth $45,055 in five years, what is its worth now?
CAHSEE Math 6.2 Algebra and Functions 193 Views
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Description:
Algebra and Functions: Drill Set 6, Problem 2. Solve the inequality.
Transcript
- 00:03
And here's your shmoop du jour.
- 00:05
Solve the inequality 3x - 5 < x + 7 for x.
- 00:10
And here are the potential answers...
- 00:12
Before we spoil the ending, hit pause and try it yourself.
- 00:17
So now we have TWO x's to manage...
Full Transcript
- 00:19
...and a "greater than" thingy...
- 00:21
...otherwise, the algebra is pretty straightforward.
- 00:24
Start by adding 5 to both sides and we get 3x is less than x plus 12.
- 00:29
Now let's subtract an x from both sides and we get 2x is less than 12.
- 00:34
Divide both sides by 2 and we have x is less than 6 - the answer is D.
- 00:40
We did a pretty good job managing that problem, if we do say so ourselves.
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