Question 103174
.05x+.10*30=.08(30+x)
.05x+3=2.4+.08x
.05x-.08x=2.4-3
-.03x=-.6
x=-.6/-.03
x=20 gallons of 5% acid will be needed.
proof
.05*20+3=.08*50
1+3=4
4=4