My Math Forum  

Go Back   My Math Forum > High School Math Forum > Elementary Math

Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion

LinkBack Thread Tools Display Modes
March 20th, 2012, 08:23 PM   #1
Joined: Feb 2012

Posts: 9
Thanks: 0

I have many problems (refreshing) MID TERM TOMORROW

2(4x +2) = 8

Show 4/12 is equivalent to 1/3

7/35 - 4/5 = Blank/5 Really confused. Denominator should equal when subtracting fractions. How is the listed answer use denominator of 5?

1/4x = 3 (1/4 x 12 = 3 doing math in my head, but how do you show it?) x = 12 right?

3(2x + 3) = 6x - 4
csoles is offline  
March 20th, 2012, 09:01 PM   #2
Senior Member
MarkFL's Avatar
Joined: Jul 2010
From: St. Augustine, FL., U.S.A.'s oldest city

Posts: 12,211
Thanks: 520

Math Focus: Calculus/ODEs
Re: I have many problems (refreshing) MID TERM TOMORROW


Factor a 2 from within the parentheses:

Divide through by 4:

Subtract 1 from both sides:

Divide through by 2:


3.) We may reduce the first term: so now the expression is:

So -3 goes in the blank.


Multiply through by 4:


On the left distribute the 3:

Subtract 6x from both sides:

This is false, so there is no solution to the equation. The geometric interpretation is trying to find the point of intersection of two separate parallel lines.
MarkFL is offline  

  My Math Forum > High School Math Forum > Elementary Math

mid, problems, refreshing, term, tomorrow

Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Need some tips refreshing on Trigonometry and Adv. Algebra leo255 Trigonometry 5 October 18th, 2013 11:20 PM
Exam Tomorrow! Need Help :( Chriiisss Applied Math 0 April 21st, 2013 04:36 PM
exam tomorrow, few problems with surds,sequences,factorising gladiatorx Algebra 11 January 9th, 2011 11:16 AM
Term by term differentiation forcesofodin Real Analysis 4 August 14th, 2010 05:50 PM
Derrivative of e^t or ln (Need by tomorrow) hikagi Calculus 2 December 16th, 2007 08:02 PM

Copyright © 2019 My Math Forum. All rights reserved.