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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.

$5x - 7 = 8$

Step 1:	$5x-7+7$	$= \ \ 8$
Step 2:	$5x$	$= \ \ 8$
Step 3:	$\(5x)/5$	$= \ \ 8/5$
Step 4:	$x$	$= \ \ 8/5$

It is correct.
Step 1 is incorrect because you should divide by 5 first.
Step 1 is incorrect because you have to add 7 to both sides.
Step 3 is incorrect because you only need to cancel the 5, not divide.