So i'm pretty good at math, but i just fomt know how to do this. i mean i fo, but i don't understand what the question wants me to do. the question is for number 19, but twenty is the exact same problem but with different numbers, so feel free to answer that one too

Scenario: susan wants to make 2 square flags to sell at a crafts fair. the fabric she wants to buy is 3 meters wide. she doesn't want any fabric left over. what's the least amount of fabric she should buy? question: which equation will susan solve her problem? note: let x represent the length of 1 side of the flag. options: 1) 2x^2 = 4x 2) 8 +2x = 2(4x) 3) 2 * 2 = 4 * 2 4) 4x^2 -2x = 0