Which does not have the same value -3/-7 -3/7 3/-7

The expression -3/-7 does not have the same value as the other expressions.

To determine which fractions do not have the same value among -3/-7, -3/7, and 3/-7, we can simplify each fraction.

First, let's simplify -3/-7:

When both the numerator and denominator of a fraction are multiplied by the same value, the value of the fraction does not change. So, multiplying both the numerator and denominator of -3/-7 by -1, we get:

(-3/-7) * (-1/-1) = 3/7

Next, let's simplify -3/7:

Since -3 and 7 do not share any common factors other than 1, this fraction cannot be simplified any further.

Lastly, let's simplify 3/-7:

Again, since 3 and -7 do not share any common factors other than 1, this fraction cannot be simplified either.

So, among -3/-7, -3/7, and 3/-7, only -3/7 does not have the same value as the other two fractions.