ABOUT THIS WEB PAGE

LINEAR COMBONATION

1. MULTIPLY ONE OR BOTH OF THE EQUATIONS BY A
CONSTANT TO OBTAIN COEFFICIENTS THAT DIFFER ONLY
IN SIGN FOR ONE OF THE VARIABLES

2. ADD THE REVISED EQUATIONS FROM STEP 1. COMBINING LIKE TERMS WILL ELIMINATE ONE OF THE VARIABLES. SOLVE FOR THE REMAINING VARIABLE

3. SUBSTITUTE THE VALUE OBTAINED IN STEP TWO INTO AN ORIGINAL EQUATION AND SOLVE FOR THE OTHER VARIABLE.

SUBSTITUTION

1. SOLVE ONE OF THE EQUATIONS FOR ONE OF ITS VARIABLES

2. SUBSTITUTE THE EXPRESSION IN STEP 1 INTO THE OTHER EQUATION AND SOLVE FOR THE OTHER VARIABLE

3. SUBSTITUTE THE VALUE IN STEP TWO INTO THE REVISED EQUATION FROM STEP ONE AND SOLVE.

GRAPHING

1. SOLVE EACH EQUATION FOR Y IF NEEDED.

2. GRAPH THE TWO EQUATIONS

3. FIND THEIR INTERSECTION AND THAT IS YOUR SOLUTION