College Algebra be Objective #2: Solve a formula for a variable. Solved Problem #2 Pencil Problem #2 2. Solve each formula for the specified variable. 2. Solve each formula for the specified variable. 2a. P=21+2w for w 2a. T = D+ pm for p P =21+2w P-21 =21-21 +2w P-21 = 2w P-21 2w 2 2 P-21 -= w or w =- P-21 2 2 2b. P = C+MC for C 2b. IR + Ir = E for / Begin by factoring out C on the right. P =C+MC P = C(1+ M) P C(1+M) 1+M 1+M P P = C or C = 1 +M 1+M Answers for Pencil Problems (Textbook Exercise references in parentheses): la. TV: 9 years; sleeping: 28 years (1.3 #19)