All
Humanities
Math
7th grade (U.S.)
8th grade (U.S.)
Algebra
Exponent expressions and equations
Graphing and analyzing linear functions
Introduction to algebra
Linear equations
Linear inequalities
Multiplying and factoring expressions
Quadratic equations
Systems of equations and inequalities
Arithmetic and pre-algebra
Addition and subtraction
Applying mathematical reasoning
Arithmetic properties
Decimals
Exponents, radicals, and scientific notation
Factors and multiples
Fractions
Measurement
Multiplication and division
Negative numbers and absolute value
Ratios, proportions, units and rates
Telling time
New and noteworthy
Science
Talks and interviews
Sort By

Newest

Example 1: Solving systems by substitution

Solving systems by substitution 1

Khan Academy
Solving systems with substitution
577
03:43

Substitution method 3

Substitution Method 3

Khan Academy
Solving systems with substitution
558
05:57

Substitution method 2

Substitution Method 2

Khan Academy
Solving systems with substitution
601
03:43

The substitution method

The Substitution Method

Khan Academy
Solving systems with substitution
531
04:38

Example 3: Solving systems by substitution

Solving systems by substitution 3

Khan Academy
Solving systems with substitution
606
06:03

Example 2: Solving systems by substitution

Solving systems by substitution 2

Khan Academy
Solving systems with substitution
559
04:05

Practice using substitution for systems

Example doing Khan Academy systems of equations exercise at: http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/e/systems_of_equations_with_substitution

Khan Academy
Solving systems with substitution
600
04:20