Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
General Math
Calculus
Differential Equations
Topology and Analysis
Linear and Abstract Algebra
Differential Geometry
Set Theory, Logic, Probability, Statistics
MATLAB, Maple, Mathematica, LaTeX
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
General Math
Calculus
Differential Equations
Topology and Analysis
Linear and Abstract Algebra
Differential Geometry
Set Theory, Logic, Probability, Statistics
MATLAB, Maple, Mathematica, LaTeX
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Mathematics
General Math
How much do 3 televisions cost?
Reply to thread
Message
[QUOTE="HOI, post: 6770697, member: 567247"] Let "W" be the cost of a single washing machine and let "T" be the cost of a single television set. "The total cost of 2 similar televisions and 5 similar washing machines is 7215". So 2T+ 5W= 7215. That is what you have though I think it is simpler, and less error prone, to use single letters rather than full words (clearly stating what those letters represent). This is a single equation in two unknowns so we need another equation in order to solve for specific values of T and W. "Each washing machine costs $216 less than a television." This is our second equation: W= T- 216. You want to solve 2T+ 5W= 7215 and W= T- 216. The obvious thing to do is to replace W in the first equation by T- 216: 2T+ 5(T- 216)= 7215. [/QUOTE]
Insert quotes…
Post reply
Forums
Mathematics
General Math
How much do 3 televisions cost?
Back
Top