Question

plzz answer fast its urgent... plzz answer of only 1st answer

Answer 1

Answer:

be no. 10 rupee be x

and no.5 rupee be y

so,10x+5y=190..... 1

and in 2nd case

be no. 5 rupee be x

and no.10 rupee be y

5x+10y=186.......2

multiply eqn 2 by 2

10x+20y=372

by elimination mehod

      10x+20y=372

      10x+5y=190

Ans.0+15y=182

              y=182/15

             y=12.13

put y=12.13 in eqn 1

10x+5*12.13=190

10x+60.65=190

10x=190-60.65

10x=129.35

x=12.935   y=12.13