Question

multiply -12/20 by the reciprocal of 160/18​

Answer 1

Answer:

-12/20 160/18. Then cross cutting. -6/10 8/9. Then answer is -480/90

Answer 2

Answer:

let the natural number=c

If the no. increased by 12=x+12

Reciprocal of the problem given ,

x+12=160 times of reciprocal of x

x+12=160/x

x(x+12)=160

x^2+20x-8x-160=0

x(x+20)-8(x+20)=0(

(x+20) (x-8)=0

x=-20 or x=8

but x is a natural no.

therefore

Required no.x=8