+0  
 
+1
195
1
avatar+20 

whats -84 X 5n- x

bottleplane  Sep 21, 2017
 #1
avatar+70 
0

-84*5n-x

 

is

 

-420n-x

 

Did you write this problem correctly cause it is very strange...

NediaMaster  Sep 21, 2017

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