Final answer:
Dave weighed 185 pounds before.
Step-by-step explanation:
To find out how much Dave weighed before, we can set up an equation using the given information. Let's say Dave's initial weight is 'x' pounds. According to the question, he needs to gain 24.3% of his body weight to reach 230 pounds. So, we can set up the equation:
x + 0.243x = 230
Simplifying the equation:
1.243x = 230
x = 230 / 1.243
x = 185 pounds
Therefore, Dave weighed 185 pounds before.