Khan Academy / Middle School / Math
Lecture : Systems of Three Variables 2
By Salman Khan | Developmental Math 2
Lecture 45 of 47
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 More Lectures - Select Lecture...1 : Monomial Greatest Common Factor2 : Factor polynomials using the GCF3 : Factor expressions by grouping4 : Factoring trinomials with a leading 1 coefficient5 : Factoring trinomials with a common factor6 : Factoring trinomials with a non-1 leading coefficient by grouping7 : Factoring perfect square trinomials8 : Factoring difference of squares9 : Factoring Sum of Cubes10 : Factoring the Difference of Cubes11 : Solving factored equations12 : Solving quadratics by factoring13 : Applications Problem Factoring Quadratics14 : Plotting (x,y) relationships15 : Quadrants of Coordinate Plane16 : Graphing using X and Y intercepts17 : Ordered pair solutions of equations18 : Application problem with graph19 : Graphical Slope of a Line20 : Slope of a Line 221 : Slope of a Line 322 : Equation of a line23 : Equation of a line 224 : Equation of a line 325 : Slope of Perpendicular Line26 : Parallel Line Equation27 : Graphing Inequalities28 : Graphing Inequalities 229 : Graphings Systems of Equations30 : Testing a solution for a system of equations31 : Consistent and Inconsistent Systems32 : Independent and Dependent Systems33 : Graphical Systems Application Problem34 : Graphical System of Inequalities35 : Testing Solutions for a System of Inequalities36 : System of Inequalities Application37 : The Substitution Method38 : Substitution Method 239 : Substitution Method 340 : Addition Elimination Method 141 : Addition Elimination Method 242 : Addition Elimination Method 343 : Addition Elimination Method 444 : Systems of Three Variables45 : Systems of Three Variables 246 : Three Equation Application Problem47 : Solutions to Three Variable System

Course Description

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Courses Index
1 : PreAlgebra - Part II: 6th grade   (Derek Owens / Derek Owens)
2 : PreAlgebra - Part I: 6th grade   (Derek Owens / Derek Owens)
3 : PreAlgebra   (Salman Khan / Khan Academy)
4 : PreAlgebra – Worked Examples   (Salman Khan / Khan Academy)
5 : Algebra I   (Multiple Instructors / )
6 : Algebra I - 8th grade   (Derek Owens / Derek Owens)
7 : Algebra I - Review   (Derek Owens / Derek Owens)
8 : Fundamentals of Algebra I   (James Sousa / MathIsPower4U)
9 : Algebra I - 2008 Holt Algebra 1 Textbook   (Brad Robb / WowMath)
10 : Algebra I - Worked Problems   (Salman Khan / Khan Academy)
11 : Algebra I – Worked Examples   (Salman Khan / Khan Academy)
12 : Algebra I – Word Problems   (Julie Harland / MathGal)
13 : Real World Math – Problem Solving Skills   (Multiple Instructors / NASA)
14 : Fraction & Ratio Problems – Grade 6th   (Multiple Instructors / Coolblueocean2001)
15 : Art of Problem Solving – MathCounts Concepts   (Richard Rusczy / MathCounts)