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Substitution Method 2
Substitution Method 2
Khan Academy
Solving systems with substitution
1133
03:43
Substitution Method 3
Substitution Method 3
Khan Academy
Solving systems with substitution
1009
05:57
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
1078
04:20
