Final answer:
The equation to find y, the total weight of the barbell after adding two 25-pound weights to a barbell weighing x pounds, is y = x + 50.
Step-by-step explanation:
To find y, the total weight of the barbell in pounds after Josh added two 25-pound weights, we can start with the weight of the barbell itself, which is x pounds. Each weight is 25 pounds, and since there are two, we have 2 times 25 pounds. The equation to represent the total weight y would be:
y = x + 2(25)
This equation adds the weight of the barbell, x, with the weight of the two added 25-pound weights. Simplifying, we can also write it as:
y = x + 50
where 50 represents the combined weight of the two 25-pound weights.