Answer:
-18/7
Explanation:
When subtracting a negative, the sign becomes positive, so now the equation would be -3 2/7 + 5/7.
By turning -3 2/7 into an improper fraction, you would get -23/7 + 5/7.
-23 +5 = -18 so -18 would be the numerator over the denominator (7) equals -18/7