Solving Systems of Equations

Solve using substitution:

2x - y = 4 and y = -2x + 8.

What is the value of x in the solution for this system?

• x = 8

• x = 3

• x = 11

• x = 5

If a system of equations has no solution, what does the graph look like? 

• intersecting lines
• parallel lines
• skew lines
• intersecting lines

Tags

CCSS.8.EE.C.8A

Solve the system using substitution:

8x + 4y = 12

y = -2x + 3

• (0, 3)

• (3, 0)

• No solution

• Infinite solutions

Solve using elimination. What is the y value of the solution?

x - 2y = 1

x + 4y = 7

• 1

• -1

• 3

• 4

What is the solution?

• (1, -1)
• (-1, 1)
• (0, -2)
• (2, 0)

Tags

CCSS.8.EE.C.8A

What is the solution?

• (-3,-8)

• (-8,-3)

• (3,-8)

• (8,3)

When you graph the exact same equation twice,

• you will have no solution. 
• you will have one solution.
• you will have infinite solutions. 
• you will graph a giraffe. 

Tags

CCSS.8.EE.C.8A

How many solutions will this system have? 

• No solution
• One Solution
• I Don't Know
• Infinitely Many Solutions

Tags

CCSS.8.EE.C.8A

If a system of equations has infinitely many solutions, what does the graph look like? 

• intersecting lines
• parallel lines
• skew lines
• the same line (coinciding lines)

What is the solution to the system?

• (0, 3)
• (1, -1)
• (-3, 1)
• (1, 3)