One Solution, No Solution, Many Solutions

How many solutions does this equation have?

6x - 3 = 6x + 9

• One Solution

• No Solution

• Many Solutions

Tags

CCSS.8.EE.C.7A

How many solutions does this equation have?

4y + 5 = 4y - 7

• One Solution

• No Solution

• Many Solutions

Tags

CCSS.8.EE.C.7A

How many solutions does this equation have?

3x = x + 4

• One Solution

• No Solution

• Many Solutions

Tags

CCSS.8.EE.C.7A

Find the error in the problem below
19 - 2k = 3k - 1
     +3k   +3k
19 + 1k = -1
-19           -19
k = -20

• They should have divided by 1 for the last step
• They should add 19 instead of subtracting 19
• I can not find an error
• Instead of adding 3k they should subtract 3k

Tags

CCSS.HSA.REI.A.1

Find the Error
What error did the student make when solving the equation:
1/5x + 6 = 3/5x + 5
1x + 6 = 3x + 5
-2x + 6 = 5
-2x = -1
x = 1/2

• The student found an incorrect common denominator
• The student did not multiply all terms by the common denominator
• The student did not use opposite operations appropriately
• The student did not correctly eliminate the variable from one side of the equation

Tags

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.3

How many solutions does the equation below have?
6(3a +1) - 30 = 3(2a - 4)

• Identity
• No Solution
• Three Solutions
• One Solution

Tags

CCSS.8.EE.C.7A

Solve

• 5

• 2

• No Solution

• Infinitely Many Solutions

Tags

CCSS.8.EE.C.7A

Describe what was done in each solving step!

• Divide by -10 on both sides

• Step 3

• Subtract 10 from both sides

• Step 4

• Subtract 4x from both sides

• Step 1

• Distribute

• Step 5

• Combine Like Terms

• Step 2