Question

What amount of a 40% acid solution must be mixed with 100 mL 10% solution to produce a 25% solution?

Answer 1

AAAaannndd the bot gets it wrong yet again!

40x + 10*100 = 25(x+100)

Answer 2

To produce a 25% solution, you need to mix 100 mL of 10% solution with (100 mL)(0.25) = 25 mL of 40% solution.