Yuri solved the equation below incorrectly. Explain the step where he went wrong.

fifteen times b minus one equals thirty

Step 1: fifteen times b minus one minus one equals thirty minus one
Step 2: fifteen times b equals twenty-nine
Step 3: fifteen times b divided by fifteen equals twenty-nine divided by fifteen
Step 4: b equals twenty-nine fifteenths

Question

Yuri solved the equation below incorrectly. Explain the step where he went wrong. 

fifteen times b minus one equals thirty 

Step 1: fifteen times b minus one minus one equals thirty minus one 
Step 2: fifteen times b equals twenty-nine 
Step 3: fifteen times b divided by fifteen equals twenty-nine divided by fifteen 
Step 4: b equals twenty-nine fifteenths

anonymous · Answer

15b - 1 = 30
15b - 1 + 1 = 30
15b = 31
15b / 15b = 31 / 15
$$b \approx 2.06$$

Yuri did step 2 wrong, she subtracted one instead of adding it to isolate b.

lynfran · Answer

no he made a mistake at the very first step...

cutebunny12 · Answer

thank u