Solving%20Linear%20Systems

1
Solving Linear Systems

• Choosing a Method

2

• For each of the following
• Determine which method
• Graphing
• Substitution
• Elimination
• is the best and state a reason.

3
Linear System 1

• C 30n
• C 5n 60
• Answer Substitution
• Reason It is set up with one variable already
  isolated!!

4
Linear System 2

• y 3x 15
• y x 10
• Answer Substitution
• Reason - It is set up with one variable already
  isolated!!

5
Linear System 3

• x y 5
• x y 6
• Answer Elimination
• Reason The equations are already set up for
  adding or subtracting them!!

6
Linear System 4

• Answer Graphing

• Reason We cannot solve algebraically with an x2
  in an equation!!

7
Linear System 5

• Answer Substitution

• Reason - It is set up with one variable already
  isolated!!

8
Linear System 6

• 5x 3y -5
• 3x 6y 4
• Answer - Elimination
• Reason No variables are alone on one side of
  the equal sign!

9
Linear System 7

• Answer Elimination

• Reason No variables are alone on one side of
  the equal sign!!

10
Linear System 8

• Answer - Graphing

• Reason the 4/x is the same as x-1 which
  again, we cant solve algebraically!!