There are 2 containers that added up to 1 quart, so let's subtract the one quart from the 2 gallons(8 quarts), leaving behind 7 quarts.
The conversion between quarts and pints are 1qt=2pt, according to the key you provided. Then 7 quarts will equal to 14 pints. And therefore, she will need 14 pint containers.
-2x+14=x²-3x+12 add 2x on both side: 14=x²-x+12 subtract 14 on both side: x²-x-2=0 factor: (x-2)(x+1)=0 x=2 or x=-1 HOPE THIS HELPS AND PLEASE MARK ME AS BRAINIEST AND ADD ME AS A FRIEND