PLEASE HELP!! :) Gilbert was thinking of a number. He doubled up it and added 5. What equation shows how to find his original number if the result was 29?

A. 2n + 5 = 29
B. 1/2n + 5 = 29
C. n + 5 = 1/2 29
D. 2n = 29 + 5

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