Let x=gallons of 80% solution to be mixed
x+80=gallons go final 70% mixture
..
80%*x+30%*80=70%*(x+80)
.8x+24=.7x+56
.1x=32
x=320
gallons of 80% solution to be mixed=320
Answer:
i think its a 6/7 and 60/70
Answer:
(7,-1)because it is problem of vector lesson so that we have to use formula of vector
