Question 460215
.50x+.35*10=.40(10+x)
.50x+3.5=4+.40x
.50x-.40x=4-3.5
.10x=.5
x=.5/.10
x=5 gallons of 50% are required,
Proof:
.50*5+.35*10=.40(10+5)
2.5+3.5=.4*15
6=6