<span>Let x = amt of water evaporated :.05(50) = .08(50-x) 2.5 = 4 - .08x .08x = 4 - 2.5 .08x = 1.5 x = 18.75 lb of water evaporated : ; Check; amt of salt remains the same, only the percentage is different, right? .05(50) = .08(50-18.75) .05(50) = .08(31.25) 2.5 = 2.5</span>
1, 2 and 6 are right.
Solution go on infinitely
all solution are negative because its number less than -20
solution contain rational among others
-20 and -5
-20*-5 is 100
and -20+(-5) is -25