How do you translate the words into a mathematical expression: the difference of 5 and twice x?

1 Answer
Aug 16, 2016

# rArr 5-2x " or "2x -5#


Look at each phrase separately:

"Twice #x# means x multiplied by 2. This is written as #2x#

The "DIFFERENCE" is the answer to a subtraction operation.
It is always used with the word "AND" indicating which two numbers must be subtracted.

The DIFFERENCE between 10 AND 7 #" "rArr " 10-7 = 3#

In the context of the question it does not matter which way the terms are subtracted.

The DIFFERENCE of 5 AND "twice x" is written as:

# rArr 5-2x " or "2x -5#