ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Playlist Solving Equations and Inequalities 11 videos
If you have to solve a multi-step equation, you might as well do it with fractions, right?
Solving Equations with Variables on Both Sides Example 16951 Views
Share It!
Description:
Transcript
- 00:00
Thank you multistep equations with variables on both sides ah
- 00:07
la shmoop running the reindeer has always tried to follow
- 00:10
in the footsteps of his brother rudolf every year rudolph
- 00:14
by santa and expensive new hat out of the goodness
- 00:18
of his heart rudolph gives running exactly half his cash
Full Transcript
- 00:22
so they'll have the same amount to spend on christmas
- 00:25
gifts on the way to the sugar plum all acute
- 00:28
victim recognizes rudolph and offers to give him seven dollars
- 00:32
to take a photo with he and his famous knows
- 00:35
rudolph doesn't want running to feel left out so he
- 00:37
pays the vixen two dollars to take a photo with
- 00:40
running in his slightly less famous schnoz Well rudolph even
- 00:43
asked the vixen teo give the seven dollars to running
- 00:46
instead we'll check out running has exactly enough money to
- 00:49
purchase two hats while rudolph has exactly enough to buy
- 00:53
one Can you determine the price of one of these
- 00:57
hats Hoof a lot of information Well it'll help to
- 01:00
be able to solve this sort of problem however because
- 01:02
the type of situation that pops up a lot in
- 01:04
real life first we need to determine the variable we're
- 01:07
going to use way don't know how much money each
- 01:09
reindeer started with but we do know that they started
- 01:12
with the same amount since the problem tells us that
- 01:15
rudolph gave half is cash to running before they headed
- 01:19
out So let's call their starting cash ex same for
- 01:22
both Then rudolph gave two dollars to the cute vixen
- 01:26
so ex minus two running on the other hand received
- 01:30
seven dollars from his fangirl So x plus seven goes
- 01:34
there However we're also told that running is able to
- 01:37
buy twice as many hats Is rudolph after this little
- 01:40
exchange which means that we'd have to multiply the expression
- 01:43
for rudolph by two has set he's equal to one
- 01:47
another So two times the quantity x minus two equals
- 01:51
x plus seven multiplying that two on the left hand
- 01:54
side we get to x minus four equals x plus
- 01:57
seven Of course we want to get x by itself
- 02:00
so we know how much cash all of these guys
- 02:02
started with so we can subtract x from both sides
- 02:05
to get x minus four equals seven then had four
- 02:08
to each side to get x equals eleven And there
- 02:11
we have it Each ranger started their shopping trip with
- 02:14
eleven bucks but that's not what the questions asking We
- 02:18
know that rudolph gave away two dollars and still had
- 02:20
exactly enough money to buy one hat itself He started
- 02:24
with eleven bucks and gave way to box leaving himself
- 02:26
with nine box Then each hat must run nine dollars
- 02:31
on the button We can double check to see if
- 02:33
that's correct by plugging the same number in the runnings
- 02:35
equation We started with eleven dollars and the vixen gave
- 02:38
him another seven giving him eighteen dollars total And sure
- 02:42
enough eighteen divided by nine is too meaning Running would
- 02:45
have had exactly enough cash to buy two hats It's
- 02:49
like santa has a new favorite this year This allergy 00:02:52.87 --> [endTime] season strikes
Related Videos
When you're about to marry the love of your life, not many things could stop you. However, finding out that your future hubby is keeping his crazy...
Here at Shmoop, we work for kids, not just the bottom line. Founded by David Siminoff and his wife Ellen Siminoff, Shmoop was originally conceived...
ACT Math: Elementary Algebra Drill 4, Problem 5. What is the solution to the problem shown?
AP® English Literature and Composition Passage Drill 1, Problem 1. Which literary device is used in lines 31 to 37?
AP® English Literature and Composition Passage Drill 2, Problem 1. What claim does Bacon make that contradicts the maxim "Whatsoever is delig...