+0  
 
+2
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solve for r

 

0= r-10

       -1         

 

that is r-10 divided by -1

 Nov 29, 2017
edited by Guest  Nov 29, 2017
 #1
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0

Solve for r:
0 = 10 - r/-1  cross multiply

0 = 10 - r is equivalent to 10 - r = 0:
10 - r = 0

 

-r =-10   multiply both sides by -1

r = 10

 Nov 29, 2017
edited by Guest  Nov 29, 2017

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