Answer:
-2k + 6
hope its right
-2k - (-5) + 1
You should always switch the signs to their opposites if you're mutiplying a negative such as the - (-5) Hope I make sense
-2k + 5 + 1
-2k + 6
6/4 = 1 1/2 gallons
2 - 1 1/2 = 1/2 gallon
She has 1/2 a gallon left over
