Question

What is the weight of a square if a triangle weights 4 grams?

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Answer 1

The weight of the square is 8 grams.

What is the weight of the square?

Let's define the variables:

x = weight of a triangle.

y = weight of a square.

We can see that we have equilibrium, so the total weight in both sides must be equal, then we can write the equation:

x + y + y = x + x + x + y

We know that x = 4 grams, then we can replace:

4g + 2y = 3*4g + y

4g + 2y = 12g + y

Solving this equation for y, we will get:

2y - y = 12g - 4g

y = 8g

The squares weight 8 grams.