The difference of a number divided by 3 and 6 is equal to 5. What is the number?

4 Answers
Nov 5, 2017

The number is 30.

Explanation:

Let x be the number, then the equation is:

#x/3-x/6 = 5#

Multiply both sides of the equation by 6:

#2x - x = 30#

#x = 30#

Nov 5, 2017

33

Explanation:

Let #x# be the number

#x/3 - 6 = 5#

Multiplying both sides of the equation by 3,
#x-18=15#
#x=15+18#

Therefore,
#x=33#

Nov 5, 2017

See a solution process below:

Explanation:

First, let's call "a number": #n#

Next, we can write "a number divided by 3" as:

#n/3#

Then, we can write "the difference between" a number divided by 3 "and 6" as:

#n/3 - 6#

Now, we can complete this equation by write "is equal to 5" as:

#n/3 - 6 = 5#

To solve this, first, add #color(red)(6)# to each side of the equation to isolate the #n# term while keeping the equation balanced:

#n/3 - 6 + color(red)(6) = 5 + color(red)(6)#

#n/3 - 0 = 11#

#n/3 = 11#

Now, multiply each side of the equation by #color(red)(3)# to solve for #n# while keeping the equation balanced:

#color(red)(3) xx n/3 = color(red)(3) xx 11#

#cancel(color(red)(3)) xx n/color(red)(cancel(color(black)(3))) = 33#

#n = 33#

Nov 5, 2017

The number is either #+33# or #-3#

Explanation:

#color(red)("The difference of ")color(blue)("a number ")color(green)("divided by 3")color(red)(" and ")color(magenta)6color(brown)( " is equal to 5")#

If we represent #color(blue)("a number")# by the variable #color(blue)n#

this becomes:
#color(red)("The difference of ")color(blue)(n)color(green)(/3)color(red)(" and ")color(magenta)6color(brown)(=5)#

This has two possible interpretations
#{: (color(blue)(n)color(green)(/3) color(red)(-) color(magenta)6color(brown)(=5),color(white)("xx")"and"color(white)("xx"),color(magenta)6color(red)-color(blue)ncolor(green)(/3)color(brown)(=5)), (rarr color(blue)ncolor(green)(/3)=11,,rarrcolor(red)-color(blue)ncolor(green)(/3)color(brown)=-1), (rarr color(blue)n=33,,rarr color(blue)n=-3) :}#