Learn how to solve compound inequalities. For example, solve 2x+1>3 AND -x-5<4.
Linear_equations_with_variables_on_both_sides
Learn how to solve linear equations that have the variable on both sides of the equation. For example, solve 2x+5=6x-3.
Introduction_to_inequalities_with_variables
Algebraic inequalities (inequalities with variables) are useful for describing real-world situations. Learn how to write inequalities and graph them on the number line.
Two_step_equation_word_problems
Learn how to set up and solve equations to find answers to real-world questions.
Linear_equations_with_parentheses
Learn how to solve linear equations with parentheses using the distributive property. For example, solve -9 - (9x - 6) = 3(4x + 6).
Why_we_do_the_same_thing_to_both_sides_of_an_equation
A high-level, conceptual walk-through of what an equation represents and why we do the same thing to both sides of it
Solve any possible linear inequality in one variable. For example, solve -3x-7
One_step_addition_subtraction_equations
Solve equations by adding and subtracting numbers from both sides.
One_step_multiplication_division_equations
Solve equations by multiplying and dividing numbers from both sides.
Some of Sal's oldest (and roughest) videos on algebra. Great tutorial if you want to see what Khan Academy was like around 2006. You might also like it if you feel like Sal has lost his magic now that he doesn't use the cheapest possible equipment to make the videos.
Analyzing_the_number_of_solutions_to_linear_equations
Linear equations can either have a single solution, infinite solutions, or no solutions. Learn how to determine the number of solutions to a given equation, and how to create equations with a desired number of solutions.
Learn how to solve equations like 2x+7=13 and 3(x+4)=3, which can be solved in two steps.
Linear_equations_word_problems
Solve word problems by creating linear equations and solving them.
Linear_equations_with_unknown_coefficients
An equation like ax+3x=bx+5 can still be solved for x even though some of the coefficients are variables.
Learn how to solve more complex (mathematical) inequalities. Also learn to construct inequalities to model real-world situations.
Learn how to solve (mathematical) inequalities. A key concept in this tutorial is flipping the inequality sign when multiplying or dividing both sides by a negative number.
Explore what it means for equations with variables (algebraic equations) to be solved.
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