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

The expression that does not have the same value as the others is 3/7.

To determine which fractions do not have the same value, let's simplify each fraction:

1) -3/-7:
To simplify this fraction, divide both the numerator and denominator by their greatest common divisor, which is 1.
-3 ÷ -1 = 3
-7 ÷ -1 = 7
Therefore, -3/-7 simplifies to 3/7.

2) -3/7:
This fraction cannot be simplified further.

3) 3/-7:
To simplify this fraction, divide both the numerator and denominator by their greatest common divisor, which is 1.
3 ÷ 1 = 3
-7 ÷ 1 = -7
Therefore, 3/-7 simplifies to -3/7.

4) -3/7:
This fraction cannot be simplified further.

Hence, the fractions -3/-7 and 3/-7 do not have the same value.