See also Word Problems
These all involve solving by a word problem by writing two linear equations using 2 variables.
Solving basic word problems using a system with 2 variables. These are puzzles and riddles with numbers.
Basic Two Variable Word Problems 1: http://www.youtube.com/watch?v=4mx0IKfepJg
Basic Two Variable Word Problems 2: http://www.youtube.com/watch?v=fld8pMLht9g
SETTING UP WORD PROBLEMS USING 2 VARIABLES-PARTS 1 & 2
These two videos focus on how to define two variables, set up two equations, and check the solutions. Several problems are presented, but using the methods of graphing, substitution, and addition to solve the problems are not shown.
Part 1: http://www.youtube.com/watch?v=IDmyacLkWA8
Part 2: http://www.youtube.com/watch?v=_A_niyNpCRk
Investment (Simple Interest) Problems
Rate of Current or Wind Problems using 2 variables
Stamp Word Problem - 2 variable systems of equations
Rental Car System 2 variables: A rental car company charges a flat daily fee plus a charge for each mile driven. A car rented for 5 days and driven for 300 miles costs $178, while a car rented for 4 days and driven for 500 miles costs $197. Find the daily fee and the charge for each mile driven.
Phone Problem-system 2 variables
Hat and Scarf Problem-system 2 variables: Ben buys 2 hats and 5 scarves in a store for $111. Jose buys 4 hats and 3 scarves in the same store for $103. State the cost of a hat and the cost of a scarf.
Coffee Problem using 2 variables: At a baseball game, 212 cups of coffee were sold, and $489 was collected. If small coffees sold for $2 each and large coffees sold for $3 each, how many of each size was sold?