Solve each equation AND tell whether it is a conditional equation, an identity, or a contradiction. a. 5x9= 4(x-3) b. 5x15= 5(x-3) c. 5x 15 = 5(x 4) 2.) A pharmacist must combine 8 liters of a 40 % acid solution with some 70% solution to obtain a 50% solution. How much of the 70% solution should be used? 10 points 3.) Greg can bike from home to work in % hour. By bus, the trip takes % hour. If the bus travels 20 mph faster than Greg rides his bike, how far is it to his workplace? 10 points 4.) Solve each equation AND give the solution set in interval form. 5(x-3)-7x 4(x 3). a. b. -16x +96x > 80 C. 10 points 2x-1 3x+4