ACT Math 5.1 Elementary Algebra

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

ACT MathElementary Algebra
ACT MathematicsElementary Algebra
AlgebraWord Problems
Elementary AlgebraUnderstanding algebraic operations
Variables to express relationships
Foreign LanguageArabic Subtitled
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LanguageEnglish Language
Product TypeACT Math

Transcript

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.