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Type: Multiple-Choice
Category: Polynomials and Rational Expressions
Level: Grade 9
Standards: HSA-REI.A.1
Author: nsharp1
Created: 7 months 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.

$3x - 2 = 10 - x$

 Step 1: $3x-2+x$ $= \ \ 10-x+x$ Step 2: $4x-2$ $= \ \ 10$ Step 3: $4x-2+2$ $= \ \ 10+2$ Step 4: $4x$ $= \ \ 12$ Step 5: $(4x)/4$ $= \ \ 12$ Step 6: $x$ $= \ \ 12$
1. It is correct.
2. Step 1 is incorrect because you have to start with getting rid of the -2.
3. Step 1 is incorrect because you should divide by 3 on both sides.
4. Step 5 is incorrect because you have to divide by 4 on both sides.
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