Not sure if your the same person but I had already done the work for this problem....
Answer:
amount of water: 7, 14, 21, 28, 35
time : 1,2,3,4,5
Lets say that the first number is x and the second number is y.
from the question we know that:
y=-3x and x+y=-4
from there, you need to replace the y in the second equation with -3x since we know that is what y equals so we can have an equation with only one variable.
x+-3x+-4
Then you solve for x.
-2x=-4
x=2
then you find y with the fact that y=-3x
y=-6
Divide both sides by 5
4x + 7 = 59
Subtract 7 on both sides
4x = 52
Divide 4 on both sides
x = 13
