Finding Errors in Solving Equations

• Step 1

• Step 2

• Step 3

• Step 4

Tags

CCSS.7.EE.B.4A

Between which two steps is the error?

Given: -3(x - 4) - 2x = 6

Step 1: -3x + 12 - 2x = 6

Step 2: -x + 12 = 6

Step 3: -x = -6

Step 4: x = 6

• Given and Step 1

• Step 1 and step 2

• Step 2 and Step 3

• Step 3 and Step 4

Tags

CCSS.8.EE.C.7B

• Step 1

• Step 2

• Step 3

• Step 4

What property was used 1st to solve this problem? Given: 3(x + 4) = 18 Step 1: x + 4 = 6 Step 2: x = 2

• distributive

• multiplication prop of equality

• division prop of equality

• associative property

Tags

CCSS.HSA.REI.A.1

Did she make a mistake?

If yes, at which line did she make her first mistake?

(There are 5 steps in her process)

• Suzanne made no errors.
  

• Step 2
  

• Step 3
  

• Step 4
  

• Step 5
  

Tags

CCSS.8.EE.C.7B

Did I solve this equation correctly?

• Yes

• No

Tags

CCSS.HSA.REI.A.1

Did I solve this equation correctly?

• Yes

• No

Tags

CCSS.HSA.REI.A.1

Did I solve this equation correctly?

• Yes

• No

Tags

CCSS.HSA.REI.A.1

Did I solve this equation correctly?

• Yes

• No

Tags

CCSS.HSA.REI.A.1

Did I solve this equation correctly?

• Yes

• No

Tags

CCSS.HSA.REI.A.1