Question

The cost of 15kg tea and 17kg coffe is rs 183 and the cost of 25kg tea and 14 kg coffe is rs213 what will be the cost of 7 kg tea and 1 kg coffe

Answer 1

Step-by-step explanation:

Let the cost of tea be X

rhe cost of coffee be Y

given that

step:1 15 X+17Y=183

step:2 25X+14Y=213

15X=183-17Y

X=(183-17Y)/15

substitute this value in step 2

25(183-17Y)/15+14Y=213

5(183-17Y)/3+14y=213

915-85Y+42y=213*3

915-23Y=639

915-639=23Y

276=23Y

Y=276/23

Y=12