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Type: Multiple-Choice
Category: Polynomials and Rational Expressions
Level: Grade 9
Standards: HSA-REI.A.1
Author: nsharp1
Created: 6 years 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:	$x$	$= \ \ 12$

It is correct.
Step 1 is incorrect because you have to start with getting rid of the -2.
Step 1 is incorrect because you should divide by 3 on both sides.
Step 5 is incorrect because you have to divide by 4 on both sides.