Answer:
792 ounces
Step-by-step explanation:
At the time when the containers hold the same amount of water the value of y in the equations is the same, so

Solve the quadratic equation:

Take only the positive solution since x is positive (minutes)

Now, compute the amount of water y by replacing x = 12 in any of the two equations, for example in container A which is easier to calculate
y = 62(12) + 48 = 792
The correct answer is then 792 ounces
3x+7=-x-1
move -x to the other side
sign changes from -x to +x
3x+x+7=-x+x-1
3x+x+7=-1
4x+7=-1
move 7 to the other side
sign changes from +7 to -7
4x+7-7=-1-7
4x=-8
Divide by 4 for both sides
4x/4=-8/4
Answer: x=-2
Answer:
Reminder to drink some water, have some food and relax. <3 :)
Step-by-step explanation: