Question

Charlie mixes 15 liters of 17% acid solution with a 29% acid solution, which results in 23% acid solution.

Answer 1

(0.17×15)+(0.29x)=0.23(x+15)
2.55+0.29x=0.23x+3.45
0.06x=0.90
x=15 liters of 29% acid solution