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  • 21-01-2016
  • Mathematics
Answered

8/f = 56/105 what is f?

Verified Answer :

taskmasters
taskmasters taskmasters
  • 21-01-2016

8/15 = 56/105

This may be solved using proportion.
a/b = c/d
ad = bc   where cross products are equal.

a = 8
b = f
c  = 56
d = 105

ad = bc
8105 = f56
840 = 56f
840/56 = 56f/56
f = 15

56 ÷ 7 = 8
105 ÷ 7 = 15

Answer Link
Billymkhoi
Billymkhoi Billymkhoi
  • 21-01-2016

8/f= 56/105

Cross multiply:
56 f= 8105
⇒ f= 8*105/56= 15

Final answer: f=15~

Answer Link

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