Introduction to adding fractions with variables…
Introduction to adding fractions with variables & common denominators
A quick presentation of why we only add the numerators of fractions with common denominators, and then a quick example of adding two fractions with the same denominator.
Solving a word problem involving a sum and…
Solving a word problem involving a sum and another basic relationship using a system of lineaer equations
This demo discusses how to set up two equations to solve the situation described, and then choose the best method to use to solve for each of the variables.
Solving a word problem with two unknowns using a…
Solving a word problem with two unknowns using a linear equation.
This shows how to represent the two unknowns using their given relationship so that a linear equation can be written using one variable. Then that equation is solved to answer the question
Writing a one-step expression for a real-world…
Writing a one-step expression for a real-world situation
Some discussion of vocabulary combined with writing a simple expression from a verbal description.
Solving a word problem using a system of linear…
Solving a word problem using a system of linear equations of the form Ax + By = C
Talks about how to interpret the words to create two equations, then solves them together using the elimination method, making opposites of one variable's terms sot that the equations can be…
Solving a percent mixture problem using a linear…
Solving a percent mixture problem using a linear equation
Shows how to organize the information given in words using a chart. This allows you to use the percent formula to show how the columns are combined to then find an equation to solve for the answer,
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