Posted by Monica on Friday, July 5, 2013 at 6:05pm.
An 80% acid solution is to be mixed with a 30% solution to get 90 gallons of a 50% solution. How many gallons of each solution are needed?

math  Kuai, Friday, July 5, 2013 at 6:50pm
0.8x + 0.3(90x) = .5(90)
.8x + 27 .3x = 45
.5x +27 = 45
.5x + 27  27 = 4527
.5x = 18
x = 36
36 at 80%
54 at 30%

math  Monica, Friday, July 5, 2013 at 7:31pm
Kuai, you are awesome!!! Thank you very much! I really appreciate it!
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