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¿alguien me puede decir que método se utiliza en este problema?


¿alguien me puede decir que método se utiliza en este problema? ​-example-1

1 Answer

5 votes

Solving a system of equations we can see that:

A fishing reel costs B/ 35

A fishing rod costs B/ 40

How to find the price of each article?

Let's say that the price of a rod is x, and the price of a fishing reel is y.

First, 2 fishing reel and 5 rods cost B/ 270

And 4 fishing reel and 2 rods cost B/ 220

Then we can write a system of equations:

2y + 5x = 270

4y + 2x = 220

First we can isolate 2y in the first equation:

2y = 270 - 5x

Replacing that in the second equation:

4y + 2x = 220

2*(2y) + 2x = 220

2*(270 - 5x) + 2x = 220

540 - 10x + 2x = 220

540 - 8x = 220

540 - 220 = 8x

320 = 8x

320/8 = x

x = 40

Then the value of y is:

2y = 270 - 5*40

y = (270 - 200)/2

y = 35

These are the prices.

User Demorf
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