Download 3.2: Solving Systems Algebraically

Alg2B 3.2 Notes
Algebra II B
3.2: Solving Systems Algebraically
10/12/16
Solving by SUBSTITUTION
1. Solve one equation for one of the variables.
2. Substitute to other equation and solve.
3. Substitute back and solve.
Alg2B 3.2 Notes
Solve each system by substitution. Check your answers!
Ex 1.
Ex 2.
Alg2B 3.2 Notes
Ex 3.
Ex 4.
Alg2B 3.2 Notes
Solving by ELIMINATION
1. Line up variables on one side of equal sign, constants on other.
2. Multiply one or both equations by constant to get opposite
coefficients on x or y.
3. Add equations, solve, and substitute.
Solve each system by elimination. Check your answers!
Ex 5.
Alg2B 3.2 Notes
Ex 6.
Ex 7.
Alg2B 3.2 Notes
p.164 #3-39(eoo), 55, 56