# Polynomials and Rational Expressions Question

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

[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] |

- 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.