Answer:

Step-by-step explanation:
The computation of the total amount of water needed could be determined by using the volume formula which is shown below:

where
L = length,
W = width,
and D = depth.
Now putting the values to the above formula
Therefore, the total amount of water needed is 
We simply applied the above formula
Y= -3/5x - 2 Add -3/5x to both sides
3/5x +y= -2 Multiply both sides by 5 because 5 is the denominator.
By multiplying by 5 you can cancel out and make it a real number.
5(3/5x +y) = -2(5)
3x + 5y= -10 is the answer.
.3
Whenever finding a decimal out of a fraction divide the numerator by the denominator.