+- Online Degrees and CLEP and DSST Exam Prep Discussion (https://www.degreeforum.net/mybb)
+-- Forum: Main Category (https://www.degreeforum.net/mybb/Forum-Main-Category)
+--- Forum: General Education-Related Discussion (https://www.degreeforum.net/mybb/Forum-General-Education-Related-Discussion)
+--- Thread: College Algebra question from REA book (/Thread-College-Algebra-question-from-REA-book)
College Algebra question from REA book - joel66 - 05-18-2008
I took my first practice test on REA, scored 66
On question 29 of 60 for test 1, I am completely lost. lol
Question:
If xy-3=20 and y-3=5, then x=
The answer is 3.
Under the explanation, it gives the following steps:
xy-3x=20
Factor:
x(y-3)=20
Substituting (y-3)=5
X(5)=20
Dividing both sides by 5:
X=4
**************
My question, it shows the first step under the explanation xy-3x=20. Where did the other x come from? I noticed they placed an x behind 3.
College Algebra question from REA book - gcalvin - 05-18-2008
Yep, that's a mistake. I've never used the REA materials, but from what I hear, it's not unusual to find mistakes in them.
-Gary-