+0  
 
0
105
1
avatar

x+y+z+ø= 85

X=ø-4

y=x/8

z=x/9

Guest Apr 19, 2017
Sort: 

1+0 Answers

 #1
avatar+89781 
+1

x+y+z+ø= 85

X=ø-4

y=x/8

z=x/9

 

 

       
\(x+y+z+\phi = 85\\ x=\phi-4\\ y=x/8=\frac{\phi-4}{8} \\ z=x/9=\frac{\phi-4}{9} \\~\\ so\\ \phi-4+\frac{\phi-4}{8} +\frac{\phi-4}{9} =85\\ 72\phi-4*72+72*\frac{\phi-4}{8} +72*\frac{\phi-4}{9} =72*85\\ 72\phi+9(\phi-4)+8(\phi-4) =72*85+4*72\\ 72\phi+17(\phi-4) =72*89\\ 72\phi+17\phi-68 =72*89\\ 89\phi =72*89+68\\ 89\phi =6476\\ \phi=\frac{6476}{89}\\ \text{Now just do the substitutions to get the other pronumerals}\\ \text{The sub the answers back in to check it is all correct.}\)

Melody  Apr 19, 2017

1 Online Users

avatar
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