if 18 CR is equal to 18 CR+1 to the value of r c 5 is
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Step-by-step explanation:
18 CR= 18 CR +2 , THEN THE VALUE rC5 =?
18CR = 18C 18-r .....( By the property )
18-r = r + 2
r=8
8 C5 = 56
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