A solution weighing 500 g contains 40 g of salt. How many grams of salt are in 200 g of solution?

The desired unspecified number of grams of salt, which is in 200 grams of solution, is determined through the conditional variable “Y”.

Taking into account the data of this problem, we form the following proportion: 200 g of solution is related to U g of salt, as 500 g of solution is to 40 g of salt.

Using the conditions of this proportion, we get this equation: 200 x 40 = 500 x Y.

When we solve this equation, we get the following Y = 200 x 40/500 = 8000/500 = 80/5 = 16 grams of salt.

Answer: 16 grams of salt.