What we are going to do is add

by

. The first thing we do is make common denominators for

and

:

. Now we add

by

:

. Now we make

a mixed number:

. Therefore, your answer is

. Hoped I helped. :)
22 - 1 = -3d
21= -3d
21/-3= d
-7 = d
Bring the 1 to the other side by doing the opposite sign, so subtract 1. Solve the left side.
Bring the 3 to the other side by doing the opposite sign, so divide 21 by -3.
End with D equaling -7
Answer:
-2 21/50
Step-by-step explanation:
-2.42
-2 42/100 = -2 21/50