Question 1038631
Let d=dimes, then:
.1d+.05(20-d)=1.65
.1d+1-.05d=1.65
.05d=.65
d=.65/.05=13 dimes, 7 nickels!!!!!!!!!!!!!!!

. A solution containing 30% juice is mixed with a solution containing 10% juice to make a 100 gallons of a 12% juice mixture. How much of the juice somution was used

Let n=amount of 30% juice. Then
.3n+.1(100-n)=.12(100)
.3n+10-.1n=12
.2n=2
n=2/.2=10 gallons of 30% juice, 90 gallons of 10% juice!!!!!!!!!!!!!!!