Systems Of Equations Substitution. Left begin array l 2 x y 7 x 2 y 6 end array right we will first solve one of the equations for either x or y. These algebra lessons introduce the technique of solving systems of equations by substitution.
Solve a system of equations by substitution. Then you back solve for the first variable. Khan academy is a 501 c 3 nonprofit organization.
Left begin array l 2 x y 7 x 2 y 6 end array right we will first solve one of the equations for either x or y.
In some word problems we may need to translate the sentences into more than one equation. In the last video we saw what a system of equations is. Left begin array l 2 x y 7 x 2 y 6 end array right we will first solve one of the equations for either x or y. These algebra lessons introduce the technique of solving systems of equations by substitution.