Question 218973
.01*50+.04x=.02(50+x)
.5+.04x=1+.02x
.04x-.02x=1-.5
.02x=.5
x=.5/.02
x=25 ml of 4% is used.
Proof:
.01*50+.04*25=.02(50+25)
.5+1=.02*75
1.5=1.5