Question 185642
.10x+.05(50-x)=.09*50
.10x+2.5-.05x=4.5
.05x=4.5-2.5
.05x=2
x=2/.05
x=40 ml of 10% vinegar is used.
50-40=10 ml of 5% vinegar is used.
Proof:
.10*40+.05*10=.09*50
4+.5=4.5
4.5=4.5