1,224 minutes.
75.20 minus 14 = 61.2
61.2 / 1,224minutes
28! Multiply the 4 rows by the 6 computers per row to get 24 computers, then add the 4 computers in the fifth row to get 28 computers.
So the first thing we need to do is set up an equation (using x to represent the number). Then, we'll solve it to get the answer.
Step 1: Translate the word problem into an equation
Word problem: The sum of nine and six-tenths and a number is thirteen and two-tenths.
Equation:
+ x = 
Step 2: Isolate x by subtracting
from each side
+ x -
=
- 
Step 3: The numbers on the left cancel out, leaving x alone
x = 
Step 4: Convert the answer to decimals
x = 3.6