How many gallons of a 70% antifreeze solution must be mixed with 90 gallons of 20% antifreeze to get a mixture that is 60% antif

Question

2 years ago

12

reeze?
gallons
The number of gallons that must be mixed is
(Round to the nearest whole number.)

1 answer:

Oliga [24] · Answer 1 · 2022-07-25T08:43:11+03:00

Oliga [24]2 years ago

8 0

Answer:

360

Step-by-step explanation:

If x is gallons of 70% antifreeze solution, then:

0.70x + 0.20(90) = 0.60(x + 90)

0.70x + 18 = 0.60x + 54

0.10x = 36

x = 360