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12. In a fruit stand, the cost of 2kg of mango and a kg of atis is ₱120. The cost of a kg of mango and 3kg of atis is ₱220. How much is a kg of mango?

A. ₱27
B. ₱28
C. ₱29
D. ₱30​​

Sagot :

Naroyn007go

Answer:

B. Php 28

Step-by-step explanation:

let M is the price of mango

let A is the price of atis.

1st eq. 2M + A = 120

find A

A = 120 -2M

2nd eq. M + 3A = 220

substitute A from 2nd eq.

M + 3(120-2M) = 220

M + 360 - 6M = 220

6M-M = 360-220

5M = 140

M = 28 (price of mango)

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