Khan Academy

Elimination method review (systems of linear equations) (K-A)

Testing a solution to a system of equations (K-A)

Equivalent systems of equations review (K-A)

Systems of equations with elimination (and manipulation) (K-A)

Systems of equations with elimination: King's cupcakes (K-A)

Substitution method review (systems of equations) (K-A)

Systems of equations with elimination: potato chips (K-A)

Systems of equations with substitution: -3x-4y=-2 & y=2x-5 (K-A)

Systems of equations with elimination: x-4y=-18 & -x+3y=11 (K-A)

Systems of equations with substitution: potato chips (K-A)

Why can we subtract one equation from the other in a system of equations? (K-A)

Worked example: equivalent systems of equations (K-A)

Worked example: non-equivalent systems of equations (K-A)

Manipulating expressions using structure (example 2) (K-A)

Manipulating expressions using structure (K-A)

How many solutions does a system of linear equations have if there are at least two? (K-A)

Number of solutions to a system of equations (K-A)

Number of solutions to a system of equations algebraically (K-A)

Number of solutions to a system of equations graphically (K-A)

Number of solutions to system of equations review (K-A)

Age word problem: Arman & Diya (K-A)

Solutions to systems of equations: consistent vs. inconsistent (K-A)

Age word problem: Ben & William (K-A)

Solutions to systems of equations: dependent vs. independent (K-A)

Age word problem: Imran (K-A)