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Type: Multiple-Choice
Category: Polynomials and Rational Expressions
Level: Grade 9
Standards: HSA-REI.A.1
Author: nsharp1
Last Modified: 21 days ago

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Polynomials and Rational Expressions Question

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Grade 9 Polynomials and Rational Expressions CCSS: HSA-REI.A.1

Is the solution to the equation correct? If not, identify which step contains an error and why this step is incorrect.

[math] 5x - 7 = 8[/math]

Step 1:[math] 5x-7+7 [/math][math]= \ \ 8[/math]
Step 2:[math]5x[/math][math]= \ \ 8 [/math]
Step 3:[math] \(5x)/5 [/math][math]= \ \ 8/5 [/math]
Step 4:[math]x[/math][math]= \ \ 8/5 [/math]
  1. It is correct.
  2. Step 1 is incorrect because you should divide by 5 first.
  3. Step 1 is incorrect because you have to add 7 to both sides.
  4. Step 3 is incorrect because you only need to cancel the 5, not divide.
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