November 04, 2010 2.7 Solving Equations in One Variable. Solve. 1. 3 x+2 = 2x 3x+1 November 04, 2010 2. 3 + x-1 2 x = 8 November 04, 2010 3. 4x x+4 + 3 x-1 = 15 x2+3x-4 November 04, 2010 4. 2 x - 3 x = 7 November 04, 2010 5. Suppose that x mL of pure acid are added to 100 mL of a 35% acid solution. a. Express the concentration C(x) of the new mixture as a function of x. b. Use a graph to determine how much pure acid should be added to the 35% solution to produce a new solution that is 75% acid. c. Solve algebraically.
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