The sum of two numbers is 72, and one of them is 12 more than the other. What are the two numbers?
Select.
A) 36-48
B) 50-34
C) 60-24
D) 30-42
E) 21-63
In this problem, we are asked to find two numbers. Therefore, we must let x be one of them. Let x, then, be the first number.   We are told that the other number is 12 more, x + 12.   The problem states that their sum is 72:   word problem = 72   The line over x + 12 is a grouping symbol called a vinculum. It saves us writing parentheses.   We have:   2x = 72 âˆ’ 12   = 60.   x = 60/2= 
<gadget id="calculator">60/2</gadget>
<output>30</output>
30.   This is the first number. Therefore the other number is   x + 12= 30 + 12= 
<gadget id="calculator">30 + 12</gadget>
<output>42</output>
42.   The sum of 30 + 42 is 72.   30-42
<result>D</result>
The sum of two numbers is 72, and one of them is 12 more than the other. What are the two numbers?