3/10 = 6/20 15 сколько там будет и равно 30 сколько там будет

To solve the equation, we can cross-multiply.

For 3/10 = 6/20, we can multiply 3 by 20 and 10 by 6:

3 * 20 = 6 * 10 60 = 60

So, the equation is valid.

For 15 = 30, we can see that these two numbers are not equal.

Therefore, 15 is not equal to 30.