The first thing we will do for this case is define variables. We have then: x = amount of water to evaporate. 90-x = amount of water after being evaporated. The amount of salt is: S = 90 * 0.15 = 13.5 The percentage of salt will be: % S = 13.5 / (90 - x) = 25/100 Answer: An equation can be used to find x, the number of gallons that should be evaporated is: 13.5 / (90 - x) = 25/100
If the Soda holds 51/2 Of a gallon of Soda you need to 51 by 2 which is 25.5 2 2[51 -4 ----
then add the 1 25 2[51 -4 2x5 equals 10 ---- 11 - 10 ------ 1 half of 2 is 1 half of 1 is 0.5 1 is your remainder 1 equals 0.5 25 + 0.5 equals <span>25.5 that's how many gallons you have. :)</span>