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va9l6lchamimib
va9l6lchamimib va9l6lchamimib
  • 18-08-2016
  • Mathematics
Answered

solve the proportion: 20/16 = x/80 question 19 options: 6.25 1600 100 160

Verified Answer :

dalendrk
dalendrk dalendrk
  • 20-08-2016

\(\dfrac{20}{16}=\dfrac{20:4}{16:4}=\dfrac{5}{4}\\\\\dfrac{5}{4}=\dfrac{x}{80}\ \ \ \ |cross\ multiply\\\\4x=5\cdot80\\\\4x=400\ \  \ \ |divide\ both\ sides\ by\ 4\\\\\boxed{x=100}\)

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