Question 225689
.50*2+X=.80(2+X)
1+X=1.6+.8X
X-.8X=1.6-1
.2X=.6
X=.6/.2
X=3 GALLONS OF PURE ACID IS USED.
PROOF:
.50*2+3=.80(2+3)
1+3=.8*5
4=4