Solving a System of Equations by Elimination

Which is the best method for solving this system of equations?

• Substitution

• Elimination

• Equal Values

Which is the best method for solving this system of equations?

x-y=11

2x+y=19

• Elimination

• Substitution

• Equals Value

• Infinitely Many Solutions
• No Solution

Which is the best method for solving this system of equations?

• Substitution

• Elimination

• Equal Values

• (2, -2)
• (2, 2)
• (-2, 2)
• (-2, -2)

How many solutions does this system of equations have?

• One Solution

• No solution

• Infinitely Many Solutions

• Two Solutions

What is the first step in solving a system of equations by elimination/matrices?

• Get both equations in standard form and line up the like terms.

• Get both equations in slope-intercept form.

• Get both equations equal to zero.

• Put the x terms first.

3x + y = –14

–2x – y = 9

Which method would be best for solving this system?

• Substitution

• Elimination/Matrices

Solve for x and y
3x + 2y = 16
7x + y = 19

• (-2,5)

• (-2,-5)

• (2,-5)

• (2,5)

What is the value of the y-coordinate of the solution to the system of equations 
x-2y=1
x+4y=7 

• 1

• -1

• 3

• 4