Answer:
a
Step-by-step explanation:
175L of water is in the first tank while water is being added at a rate of 7 L per minute
550L is in the second tank while 8L of water is being drained per min
Knowing this we can create the two sides of the equation
175 + 7x = 550 - 8x
BONUS
The question asks when they will have the same amount
rearrange
8x+7x= 550-175
15x=375
x=25
