I have 2 word problems in which I need to set up the equation and arrive at an answer. I am not exactly asking for an answer to these problems, I just need help in setting the labels and equations up. For question one I have most of the information, but not for question two. The areas typed in red are the areas that I need help with. THANK YOU SOOOO MUCH!!!
1) A chemist needs 140 mL of a 32% solution but has only 22% and 50% solutions available. Find how many mL of each that should be mixed to get the desired solution.
*(Verbal Model): #of mL of 22% solution + # of mL of 50% solution=140mL of 32% solution
*(Labels): #of mL of 22% solution=x, #of mL of 50% solution=140-x, amount of 22% solution=0.22x, amount of 50% solution= .50(???), amount of 32% solution= .32(???)
*(Equation): .22x + .50(???) = .32(???)
2) Two pumps can fill a water tank in 45 minutes when working together. Alone the second pump takes 3 times longer than the first to fill up the tank. How long does it take the first pump alone to fill the tank?