Each step in a procedure to solve this equation is shown.   Equation:   5x − 7 = 3(x+1)5x - 7 = 3x+1  Step 1:   5x − 7 = 3x + 35x - 7 = 3x + 3 Step 2:   2x − 7 = 32x - 7 = 3 Step 3:   2x = −42x = -4  Step 4:   x = −2x = -2    In which step is the first error made

Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
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ChapterP: Prerequisites
SectionP.8: Solving Basic Equations
Problem 1E
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Each step in a procedure to solve this equation is shown.

 

Equation:   5x − 7 = 3(x+1)5x - 7 = 3x+1 

Step 1:   5x − 7 = 3x + 35x - 7 = 3x + 3

Step 2:   2x − 7 = 32x - 7 = 3

Step 3:   2x = −42x = -4 

Step 4:   x = −2x = -2 

 

In which step is the first error made?

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