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ACT Math 5.1 Elementary Algebra 263 Views


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Description:

ACT Math: Elementary Algebra Drill 5, Problem 1. How old is Jeremy's brother?

Language:
English Language

Transcript

00:03

A little birdie told us you wanted to solve a shmoopy math problem...

00:07

Jeremy is one year older than twice his brother's age.

00:11

If Jeremy is 17, how old is his brother? And why don't we get to know his name?

00:19

And here are the potential answers...

00:23

First of all, don't get hung up on the fact

00:25

that we don't get to find out Jeremy's brother's name.

00:27

With short problems like this, it's a good idea not to get too attached to the characters.

00:32

OK so what is this question asking?

00:34

It wants us to translate English into...Mathlish.

00:38

So here we go:

00:40

Jeremy equals 1 plus the quantity 2 times his brother's age.

00:44

And we know that Jeremy is 17.

00:46

So we substitute 17 for J and get 17 equals 1 plus 2b.

00:53

Subtract 1 from both sides and we have 16 equals 2b.

00:57

Divide both sides by 2 and we get... 8.

01:00

Answer A.

01:01

Now take a second to say good-bye to Jeremy's brother. You won't be seeing him again.

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