Polynomials Error Analysis

Find the error.

• Adding 5x to -3x equals 8x

• Subtracting 7 from both sides

• Dividing by 8 on both sides

• Simplifying -4/8 to -1/2

Find the error.

• Subtracting 1 from both sides

• Dividing by 3 on both sides

• Subtracting by 5 on each side

• -x does not equal x

Which step has the mistake?

• Step 1

• Step 2

• Step 3

• No mistakes

Which step has the mistake?

• Step 1

• Step 2

• Step 3

• Step 4

• No mistakes

Which step has the mistake?

• Step 1

• Step 2

• Step 3

• Step 4

• Step 5

Which step has the mistake?

• Step 1

• Step 2

• Step 3

• Step 4

• No mistake

Which step has the mistake?

• Step 1

• Step 2

• Step 3

• Step 4

• No mistake

Which step is wrong

• Adding 2x to 3x

• Subtracting 5 from both sides

• Adding 2x to -2x

• Dividing by 5 on both sides

Which step is incorrect?

• Subtracting 1 from both sides

• Dividing by 6 on both sides

• 3(2x+1) equals 6x +1

• x equals 3/4

Explain what mistake was made in Step 1 and what would the correct step be?

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