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

Answer 1

15b-1=30
15b=30+1
b=31/15
compare to see where he when wrong...