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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: 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 variable, which you can …
Systems of equations with substitution: potato chips
To solve a system of equations using substitution... 1. Isolate one of the variables in one of the equations, e.g. rewrite 2x+y=3 as y=3-2x. 2. You can now express the isolated variable using the …
Solving linear systems by substitution (old) - Khan Academy
And in this video, I'm going to show you one algebraic technique for solving systems of equations, where you don't have to graph the two lines and try to figure out exactly where they intersect.
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. Created by Sal Khan.
Systems of equations with substitution: y=4x-17.5 & y+2x=6.5
Learn to solve the system of equations y = 4x - 17.5 and y + 2x = 6.5 using substitution. Created by Sal Khan and Monterey Institute for Technology and Education.
System of equations | Algebra (all content) | Math | Khan Academy
This topic covers: - Solutions of linear systems - Graphing linear systems - Solving linear systems algebraically - Analyzing the number of solutions to systems - Linear systems word problems
Systems of equations with substitution (article) | Khan Academy
The tricky thing is that there are two variables, x and y . If only we could get rid of one of the variables... Here's an idea! Equation 1 tells us that 2 x and y are equal. So let's plug in 2 x for y in Equation 2 to …
Solving linear systems by substitution (old) - Khan Academy
And in this video, I'm going to show you one algebraic technique for solving systems of equations, where you don't have to graph the two lines and try to figure out exactly where they intersect.