Tom has twice as much money as Gabi. Harry has 3 times as much money as Tom. Harry has $120. How much money does Gabi have?

No algebra or variables needed here.

Just do the arithmetic.

"Harry has $120. Harry has 3 times as much money as Tom"
---> so Tom has $40

"Tom has twice as much money as Gabi"
----> Gabi has $20

Let's denote Gabi's money as "x".

Since Tom has twice as much money as Gabi, Tom's money can be expressed as "2x".
Similarly, Harry's money is 3 times as much as Tom's money, which is "3 * 2x = 6x".
Given that Harry has $120, we can set up an equation:
6x = 120
To solve for x, we need to divide both sides of the equation by 6:
x = 120/6
Simplifying further,
x = 20
Therefore, Gabi has $20.

To find out how much money Gabi has, we need to gather the information given in the question and work step by step.

Let's assign variables to represent the unknown amounts:
Let G = amount of money Gabi has in dollars.
Given that Tom has twice as much money as Gabi, we can represent that as:
T = 2G, where T represents the amount of money Tom has.

It is also given that Harry has 3 times as much money as Tom, which can be represented as:
H = 3T.

We know Harry has $120, so we can substitute this into the equation:
120 = 3T.

To solve for T, divide both sides of the equation by 3:
T = 120 / 3.
T = 40.

Now that we know the amount Tom has, we can substitute it back into the equation for Gabi's money:
T = 2G.

Replacing T with 40, we have:
40 = 2G.

To solve for G, divide both sides of the equation by 2:
G = 40 / 2.
G = 20.

Therefore, Gabi has $20.