+0  
 
0
116
2
avatar+25 

- 80% = 90

what is x

x - 64% =72

what is x

x - 15% = 146.54

what is x

jimmyjohnjeff  Mar 5, 2017
Sort: 

2+0 Answers

 #1
avatar+5552 
+6

I can show you a couple different "ways" of doing it. (They all accomplish the same thing though.)

 

\(x - \frac{80}{100} = 90 \\~\\ x=90+\frac{80}{100} \\~\\ x=\frac{454}{5}=90.8\)

---------------------------------------------------------------------------------

\(x - \frac{64}{100} = 72 \\~\\ x-0.64=72 \\~\\ x=72+0.64=72.64\)

---------------------------------------------------------------------------------

\(x - 15\% = 146.54 \\~\\ x - 0.15 = 146.54 \\~\\ x = 146.54 + 0.15 =146.69\)

hectictar  Mar 5, 2017
 #2
avatar
0

x - 80% = 90

what is x

 

x - 80%x = 90

20%x = 90

0.20x = 90

x =90 / 0.20

x =450

 

x - 64% =72

what is x

 

x - 64%x =72

36%x = 72

0.36x = 72

x =72 / 0.36

x = 200

 

x - 15% = 146.54

what is x

 

x - 15%x = 146.54

85%x =146.54

0.85x =146.54

x =146.54 / 0.85

x = 172.4

Guest Mar 5, 2017

3 Online Users

We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details