Question

If I buy 3 kilos of chicken and 2 kilos of fish , I need to pay 660 pesos . But if I buy 2 kilos of chicken and 4 kilos of fish, I need to pay 700 pesos . How much do a kilo of chicken and a kilo of fish Cost ???

Answer 1

Answer:

1 kilo of chicken = 168 pesos and 1 kilo of fish = 78 pesos .

Step-by-step explanation:

let chicken be x

and fish be y

then , the equation will be

3x + 2y = 660 ____(1)

2x + 4y = 700_____(2)

now multiply eq 1 by 2 and eq 2 by 3 ,we get

6x + 2y =1320____(3)

6x+ 12y= 2100____(4)

eqn (4) - eqn (3) ,we get

y = 78

put this value in eqn (1) ,we get

x= 168

Hope this will help you.

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