Question 117351
.8x+.24*60=.7(x+60)
.8x+14.4=.7x+42
.8x-.7x=42-14.4
.1x=27.6
x=27.6/.1
x=276 gallons of 80% alcohol is required.
proof
.8*276+14.4=.7(276+60)
220.8+14.4=.7*336
235.2=235.2