Set 11: Linear Equations (Advanced)

Choice B is correct. Choice Ahoice D is the correct answer. 1. Define: Time for 2 nd train = $t$. Time for 1 st = $t+1$. 2. Distance Equal: $80t = 60(t + 1)$ 3. Simplify: $80t = 60 t + 60$ 4. Subtract 60 t: $20t = 60$ 5. Divide by 20: $t = 3$ 6. Verify: $80(3)=240$, $60(4)=240$ ✓ Choice Ahoice C is incorrect because it results from an error in the solution process. Choice Ahoice D is incorrect because it results from an error in the solution process. Choice Ahoice C is incorrect because it results from an error in the solution process.