This is such a great deal! Only $10 to join and $17.50 for each DVD, I order including shipping charges!

I think I will order some DVDs.

Emma joined a DVD Movie Club. It cost $10 to join and $17.50 for each DVD ordered including shipping charges. When her first order arrived, she received a bill for $115. How many DVDs did she order?

A. Write an equation to solve the problem:

B. Solve the problem and show all of your work:

Question

This is such a great deal!  Only $10 to join and $17.50 for each DVD, I order including shipping charges! 

I think I will order some DVDs.



Emma joined a DVD Movie Club.  It cost $10 to join and $17.50 for each DVD ordered including shipping charges.  When her first order arrived, she received a bill for $115. How many DVDs did she order?


A. Write an equation to solve the problem:

B. Solve the problem and show all of your work:

anonymous · Answer

@iGreen @Love_Ranaa @Conqueror

anonymous · Answer

My equation -

anonymous · Answer

(17 x ?) + 10 =

igreen · Answer

$10 to join, $17.50 for each DVD

igreen · Answer

Correct..but we can replace 17 x ? with 17x.

igreen · Answer

17x + 10 = 

What goes after the equal sign? What was her total bill?

anonymous · Answer

Yes @green

17.50 x 6 = 105 
105 + 10 = 115

igreen · Answer

No..

17x + 10 = 115

igreen · Answer

Now solve for 'x'

anonymous · Answer

@iGreen How would I figure out "X"

anonymous · Answer

Subtract?

texaschic101 · Answer

first subtract 10 from both sides of the equal sign and what do you get ?

anonymous · Answer

115 - 10 = 105
17 - 10 = 7 @texaschic101

texaschic101 · Answer

17x + 10 = 115 -- subtract 10 from both sides
17x + 10 - 10 = 115 - 10 -- the 10's cancel out on the left side
17x = 105 -- now divide both sides by 17

igreen · Answer

It's 17x, not 17

texaschic101 · Answer

wait...the equation is wrong

anonymous · Answer

115 - 10 = 105
17 - 10 = 7 
17 divided by 7 = 2.428
107 divided by 7 = 15.28

texaschic101 · Answer

17.5x + 10 = 115 is the correct equation because the CD's cost 17.50 not 17

texaschic101 · Answer

17.5x + 10 = 115 -- subtract 10 from both sides
17.5x + 10 - 10 = 115 - 10
17.5x = 105 -- now divide both sides by 17.5

anonymous · Answer

17.50x + 10 = 115

Would be the right equation

and my math I've done up there is how I got 6 CD'S

17.50 x 6 = 105 
105 + 10 = 115
______________________________________________________________

17.50 - 10 = 7.5
115 - 10 = 105

17.50 / 17.50 = 1
105 / 17.50 = 6

texaschic101 · Answer

yes, that is the equation...or you could just put 17.5x + 10 = 115...they are the same. And the answer you got is correct...it is 6

anonymous · Answer

Thank you! @texaschic101

texaschic101 · Answer

no problem :)...sorry about the mistake earlier

igreen · Answer

Nice work! $\Huge\color{lime}\checkmark$

$\Huge\ddot\smile$

anonymous · Answer

Its okay ! :D Thanks alot guys I really appreciate the help. @iGreen @texaschic101