SOLUTION: how many gallons of 30% antifreeze should be mixed with 10 gallons of 75% anitfreeze to obtain a 55% antifreeze mixture
Algebra.Com
Question 902272: how many gallons of 30% antifreeze should be mixed with 10 gallons of 75% anitfreeze to obtain a 55% antifreeze mixture
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
0.3*x+0.75*10=0.55(10+x)
0.3*x+7.5=5.5+0.55x
0.3x-0.55x=5.5-7.5
-0.25x=-2
x=8 liters at 30% is added to 10 liters of 75% to get 18 liters at 55%
check
0.3*8+0.75*10=0.55(10+8)
2.4+7.5=0.55(18)
9.9=9.9
ok
RELATED QUESTIONS
How many gallons of 20% anitfreeze should be mixed with 10 gallons of 76% antifreeze to... (answered by ewatrrr)
how many gallons of 20% antifreeze should be mixed with 10 gallons of 83% antifreeze to... (answered by stanbon,josgarithmetic)
How many gallons of 40% antifreeze should be mixed with 10 gallons of 85% antifreeze to... (answered by stanbon)
how many gallons of 70% antifreeze should be mixed with 10 gallons of 30% antifreeze to... (answered by mananth)
How many gallons of 80% antifreeze should be mixed with 15 gallons of 40% antifreeze to... (answered by mananth)
How many gallons of 20% antifreeze should be mixed with 10 gallons of 101% antifreeze to... (answered by Alan3354)
How many gallons of 20% antifreeze should be mixed with 10 gallons of 92% antifreeze to... (answered by Alan3354)
How many gallons of a solution that is 75% antifreeze must be mixed with 4 gallons of a... (answered by mpc12381)
How many gallons of 40% antifreeze should be mixed with 10 gallons of67% antifreeze... (answered by addingup,fractalier)