Andreina has a glass tank. First, he wants to put in some marbles, each of which has a volume of 0.04 liters. Then he wants to fill the tank with water until it’s completely full. If he uses 50 marbles, he will have to add 33 liters of water. Andrei has exactly 20 liters of water. How many marbles does he need so the tank is full.

what are you doing do you need examples of variable questions?

step-by-step explanation:

5a-1=9               bring the one over the =

5a=10                     divide by your variable

a=2

brainliest? ?

here try this one

3a-24=0

one triangle is 2.5 times bigger than the other triangle.

24

step-by-step explanation:

you just have to add the 15 + 9 to get 24

you do this bc you want to find the total of the whole line and those two numbers make up the line