Answer:
d= -4
Explanation:
First you multiply the 3 by 6. You don't multiply the Coefficient with the variable.
(6x3)+5d = -2
Then you'll get: 18 + 5d = -2
At this point you just subtract from both sides
18 + 5d= -2
-18 -18
This becomes 5d = -20
=

-20/5 equals -4.