++ 50 ++ 2^x 1 2^x-1=20 255471-2^x+1+2^x-1=20
2 In W x 1in L x 0875in D The 7/8 25 GA Galvanized Steel Metal Stud Model # Find My Store for pricing and availability 5 Dietrich Metal Framing 3625in W x 144in L x 125in D ProSTUD Galvanized Steel Metal Stud Model # Find My StoreProfessionals For math, science, nutrition, history, geography, engineering, mathematics, linguistics, sports, finance, music 2^x+1+2^x-1=20