Question

How many gallons of the 65% pesticide is needed to make a final solution that is 60% pesticide

Answer 1

we have that

the algebraic expression that represents this situation is

p(0.65)+25(0.25)=(25+p)(0.60)

solve for p

0.65p+6.25=15+0.60p

0.65p-0.60p=15-6.25

0.05p=8.75

p=175 gal