Math | Khan Academy
Learn fifth grade math—arithmetic with fractions and decimals, volume, unit conversion, graphing points, and more. This course is aligned with Common Core standards.
Algebra 1 | Math | Khan Academy
Khan Academy's Algebra 1 course is built to deliver a comprehensive, illuminating, engaging, and Common Core aligned experience! **Teaching this course? Check out our [teacher resources] …
8th grade math - Khan Academy
Learn eighth grade math—functions, linear equations, geometric transformations, and more. (aligned with Common Core standards)
Substitution method review (systems of equations) - Khan Academy
The substitution method is a technique for solving a system of equations. This article reviews the technique with multiple examples and some practice problems for you to try on your own.
Systems of equations with substitution: -3x-4y=-2 & y=2x-5
Learn to solve the system of equations -3x - 4y = -2 and y = 2x - 5 using substitution.
5th grade math - Khan Academy
Learn fifth grade math—arithmetic with fractions and decimals, volume, unit conversion, graphing points, and more. This course is aligned with Common Core standards.
Solving linear systems by substitution (old) - Khan Academy
An old video where Sal introduces the substitution method for systems of linear equations. Created by Sal Khan.
Systems of equations with substitution: 9x+3y=15 & y-x=5
Learn to solve the system of equations 9x + 3y = 15 and y - x = 5 using substitution.
𝘶-substitution intro (video) | Khan Academy
In these series of videos (U-substitution) you introduce the treatment of the derivative operators (dx, du, etc) as fractions. You specify that they really are not, but treat them like that anyway.
Systems of equations with substitution: 2y=x+7 & x=y-4
When solving a system of equations using substitution, you can isolate one variable and substitute it with an expression from another equation. This will allow you to solve for one …