SOLUTION: Here is my question. I KNOW the first formula, but I want to REVERSE it. Width W 28 length L 40 weight Wt 50 factor 1 F1 2 factor 2 F2 950

Algebra.Com
Question 886251: Here is my question. I KNOW the first formula, but I want to REVERSE it.
Width W 28
length L 40
weight Wt 50
factor 1 F1 2
factor 2 F2 950
Answer Y

Solving for Y
(W x L x Wt x F1) / F2 = Y
so....

Solution
(28 x 40 x 50 x 2) / 950 =118



Now I want to solve it when I don't know Wt (curretnly holding the place as "50")

(28 x 40 x Y x 2)/ 950 =118


How do I set up/reverse the formula?
(asks this grown up who hasn't had Algebra in 35 years)
Thank you!
Found 2 solutions by rothauserc, MathTherapy:
Answer by rothauserc(4718)   (Show Source): You can put this solution on YOUR website!
(28 x 40 x Y x 2)/ 950 = 118
multiply all the numbers in the parenthesis
2240Y / 950 = 118
multiply both sides of the = by 950
2240Y = 112100
divide both sides of = by 2240
Y = 50.04
weight is 50
Answer by MathTherapy(10555)   (Show Source): You can put this solution on YOUR website!

Here is my question. I KNOW the first formula, but I want to REVERSE it.
Width W 28
length L 40
weight Wt 50
factor 1 F1 2
factor 2 F2 950
Answer Y

Solving for Y
(W x L x Wt x F1) / F2 = Y
so....

Solution
(28 x 40 x 50 x 2) / 950 =118



Now I want to solve it when I don't know Wt (curretnly holding the place as "50")

(28 x 40 x Y x 2)/ 950 =118


How do I set up/reverse the formula?
(asks this grown up who hasn't had Algebra in 35 years)
Thank you!


Your formula is: 

You can solve the equation for Wt, then plug in values for W, L, , , and Y to determine the value of Wt, OR

You can just substitute all values for all known variables to determine the value of the unknown variable. 

Note that in your attempt to determine the value of Wt, you would not get: , but  instead.

This will give you the value of Wt, but since Y was actually ROUNDED to 118, you would not get a value of exactly 50

for Wt.

If you need a complete and detailed solution, let me know!!



Send comments, “thank-yous,” and inquiries to “D” at MathMadEzy@aol.com.

Further help is available, online or in-person, for a fee, obviously. 



For FREE info and answers to questions about the ASVAB exam, the NYS 3 – 8 city/state wide exams,GENERAL

MATH and HOMEWORK QUESTIONS, or MATH QUESTIONS related to the Regents Integrated Algebra, 

Regents Geometry, Regents Algebra 2/Trigonometry, SHSAT, COOP/HSPT/TACHS, PSAT, SAT, ACT, SSAT/ISEE,

GRE, CLEP, and the TASC/GED, you can visit: http://asvabstudyzone.freeforums.net/. 

RELATED QUESTIONS


Question: If the area of a golden rectangle is 6m squared, what are the length and width... (answered by Fombitz)

I have a problem that seems simple but I'm having an issue solving it. The problem is:... (answered by josgarithmetic,MathLover1)

I saw this problem in my textbook:
A rectangle has a perimeter of 42 miles and an area... (answered by solver91311)

The perimeter of a rectangular garden is 40 feet.  If the length is 6 feet more than the... (answered by mathman409)

I actually dont know if this is a geometry question but it has rectangles, perimeter, and  (answered by josgarithmetic,MathTherapy)

question; find the length when the perimeter = 24 & width = 4.

i know the perimeter... (answered by ankor@dixie-net.com)

How do I find the perimeter of a rectangle with an area of 378 square feet?  I know... (answered by jim_thompson5910,Alan3354)

I need help with this question: The area of a rectangular rug is 160sqft. if it's width... (answered by josgarithmetic,Alan3354)

Please help with this, my exam is tomorrow. Thanks

A picture frame has the perimeter... (answered by josmiceli)