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Math III Videos 103 videos

Unit Rate
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Approximately 874 people per day wonder what a unit rate is. If you're one of them, check out our video on unit rates and how to use them. (We just...

Solving Proportions Using Cross Products
6802 Views

This video covers how to use cross products to solve for a missing number in a proportion by setting that proportion with a variable over the produ...

GED Math 2.4 Rational Numbers
190 Views

GED Math 2.4 Rational Numbers. Lucius's favorite restaurant is how many km from his home?

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Solving Multi-Step Equations with Fractions 1640 Views


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Description:

If you have to solve a multi-step equation, you might as well do it with fractions, right?

Language:
English Language

Transcript

00:06

Solving Multi-Step Equations with Fractions, a la Shmoop.

00:10

Due to budget cuts... aka global warming… the annual Arctic Ball is now BYOI...

00:16

…Bring Your Own Ice. Parker Penguin has invited potential life

00:24

partner Penny Penguin to the Arctic Ball. Each penguin pair is expected to bring five

00:30

icebergs to the party.

00:33

If Parker only has two-thirds of an iceberg, how much ice will Penny need to bring to pick

00:40

up the slack? They can only transport the ice to the party in thirds.

00:45

Here are your options.

00:50

First, we need to formulate an equation to thaw out this problem.

00:57

Parker has two-thirds of an iceberg. That's the easy part. We need to know how many thirds

01:02

Pembroke needs to bring in order to equal five.

01:06

Our equation should be: two-thirds plus i-over-three equals five, and we're trying to solve for

01:12

i, which is the amount of ice. Now we need to simplify things.

01:17

We'll do this by multiplying everything by three to get rid of the fractions. 2/3 times

01:23

3 is 2. i over 3 times 3 is i. Five times three is

01:30

fifteen. So our equation is now: two plus i equals

01:34

fifteen. All we have to do now is subtract two from

01:38

both sides.

01:46

Fifteen minus two equals thirteen. So Penny will need to bring 13 pieces of ice.

01:53

So i = 13. The answer is D.

01:59

That's a lot of ice. Penny’s got it covered though. Don't be

02:04

fooled by the rocks that she’s got.

02:06

Her love don't cost a thing.

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