Solving problems using system of equations

In the next video the Professor Von Schmohawk answers to the following question:

When should a system of equations with multiple variables be used to solve an Algebra problem, instead of using a single equation with a single variable?

Solving systems of equations by elimination

Next monday we are watching the following video about de elimination method:

THE TORTOISE AND THE HARE

Today we have begun a new unit about systems of linear equations with a new version of the famous fable about the race between the tortoise and the hare. Her you are the videos:

And here is the worksheet

Orienteering: How to measure a distance using a topographic map

Presentation:

Worksheet: Click here

Orienteering: Bearings

Here you can check the exercises about bearings.

Solving problems using equations

Last week you were learning about solving first-degree and quadratic equations.
This week we are going to use equations to solve word problems. In the following videos you can find some examples:

Solving first-degree equations

Here you are this video that we were watching in class last week: "X finds out his value"