Question

the cost off 15 kg tea and 17 kg coffee is RS 183and the cost of 25 kg tea and 13 kg coffee is RS 213 what will be the the cost off 7 kg tea and 1 kg coffee
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Answer 1

Answer:

coffee-6rs

tea-378rs

Answer 2

Answer:

let the cost of 1 kg tea be. x

and 1 kg coffee be y

according to question

15x+17y=183

25x+13y=213

multiply equation 1 by 5 and equation 2 by 3 we get ,

75x+85y=915

75x+39y=639

-. -

+6y y =6

put 6 in equation 1 ,x=6

hence,cost of 1 kg coffee 6Rs.

and 7 kg tea=5.4

5.4×7=37.8

hope it's helpful .me here miss_riya