Twice the difference of a number and 7 is equal to 9. What is the number?
2 Answers
Mar 17, 2017
Explanation:
Breaking the question down into its component parts.
Twice the
difference of
a number
and 7
is equal to
9
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Given:
Divide both sides by 2
Add 7 to both sides
but -7+7=0
Mar 17, 2017
x=11.5
Explanation:
Suppose the number is x, then 2*(x-7) =9, as per the statement made in the question.
Solving this for x, gives,