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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.
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 - Khan Academy
Solve systems of equations where one of the equations is solved for one of the variables.
Solving systems of linear equations | Lesson - Khan Academy
Look at two ways to solve systems of linear equations algebraically: substitution and elimination. Look at systems of linear equations graphically to help us understand when systems of linear equations have …
Systems of equations | Algebra basics | Math | Khan Academy
How can you use clues from two algebraic expressions to figure out the value of a variable? In this unit, you'll learn how to solve a system of equations or inequalities in two variables by elimination, …
Systems of equations | 8th grade math | Khan Academy
If one line is useful, let's see what we can do with two lines. In this unit, we learn how to write systems of equations, solve those systems, and interpret what those solutions mean in a real-world context.
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Learn to solve systems of equations using substitution with interactive exercises and step-by-step guidance on Khan Academy.
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Solving systems of three linear equations in three variables: substitution
Sal demonstrates how to solve a system of three linear equations in three variables using substitution.