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CAHSEE Math Videos 210 videos
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CAHSEE Math 5.5 Algebra and Functions 266 Views
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Description:
Algebra and Functions: Drill Set 5, Problem 5. Solve the equation.
Algebra and Functions: Drill Set 5, Problem 5. Solve the equation.
Transcript
- 00:03
And here's your shmoop du jour.
- 00:05
Solve the equation 9x - 18 = 72 for x.
- 00:10
And here are the potential answers...
- 00:12
Before we spoil the ending, hit pause and try to solve it yourself.
- 00:16
This is a straightforward algebra problem that we can solve in two steps.
Full Transcript
- 00:20
Get x on one side by adding 18 to both sides...
- 00:23
...and we get 9x = 90. Next, get x all by itself...
- 00:28
...by dividing both sides by 9.
- 00:31
90 divided by 9 is 10 and voila...
- 00:33
...the answer is D.
- 00:35
That didn't take long.
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