7,2:2,4=0,9:x

To solve the equation, we need to find the value of "x" when 7,2:2,4 is equal to 0,9:x.

First, let's simplify 7,2:2,4.

To divide a decimal by another decimal, we can multiply both numbers by 10 to remove the decimal point.

So, 7,2:2,4 becomes 72:24.

Now, let's simplify 72:24.

To do this, we divide 72 by 24.

72 ÷ 24 = 3

So, 72:24 simplifies to 3.

Now, the equation becomes:

3 = 0,9:x

To find the value of "x", we can cross multiply.

3 * x = 0,9

Divide both sides of the equation by 3.

x = 0,9 ÷ 3

x = 0,3

Therefore, when 7,2:2,4 is equal to 0,9:x, the value of "x" is 0,3.