Answer:
the classmate is incorrect
Step-by-step explanation:
when you do the math for both inequalities they are equal to each other, despite the fact that one has multiplication and the other has addition.
7 - 4 ( d - 3) = 23
7 - 4d + 12 = 23
Subtract 12 from both sides,
7 - 4d = 11
Subtract 7 to both sides
- 4d = 4
Divide -4 to both sides
d = -1
Answer:

Step-by-step explanation:

Answer:
30
Step-by-step explanation:
(-22 + 6) - (- 28 + 2)
(-16) - (-26)
-16 + 26
answer is 10.