# How much 25% antifreeze and 50% antifreeze should be combined to give 40 gallons of 30% antifreeze?

##### 1 Answer

Apr 12, 2017

32 gallons of 25% and 8 gallons of 50%

#### Explanation:

let a gallons of 25% antifreeze and b gallons of 50% antifreeze be needed to get 40 gallons of 30% antifreeze .

thus ,

now ,

therefore ,