Writing equations from word problems

Writing equations from word problems is fun once you get the hang of it!  Here's a sample consumer finance problem that asks you to write an equation, followed by a video showing how to solve it.  It's a one-step equation:

Launz buys a car and a trailer for a combined cost of $40,000.  The trailer costs $2000.

a) Define a variable for the car’s cost.
b) Write an equation to describe the problem.
c) Solve the equation algebraically.
d) Hence, state the cost of the car.


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