20% of the ointment is too weak and 60% is way too strong, but 25% is just right. To get 25% you have to mix 24 fluid onces in volume. How many fluid onces of each did we use? I give out medals :)

Question

dumbcow · Answer

A +B = 24
.2A + .6B = .25(24)

dumbcow · Answer

solve using elimination
multiply bottom equation by -5

A + B = 24
-A -3B = -30
-------------
     -2B = -6
      B = 3

A + 3 = 24
A = 21

anonymous · Answer

can u please show me ??? I will give u a medal :)

dumbcow · Answer

??
i already wrote the solution

dumbcow · Answer

which part do you not understand