Question

wat is -3(j+3)+9j<-15

Answer 1

As a first step, you need to simplify the stuff on the left of the inequality:

-3(j + 3) + 9j < -15

Multiply/distribute that "-3" over the parenthesis:
-3j - 9 + 9j < -15

Then collect and combine the "j" terms...
-3j + 9j - 9 < -15
6j - 9 < - 15

Then add 9 to both sides to "move" the 9 to the right side:
6j - 9 + 9 < -15 + 9
6j < -6

Finally, divide both sides by 6 to isolate the "j" on the left of the inequality.

Does that make sense? It's just like working an algebra equation, but it is an inequality instead. Rather than get a single solution for j like if you "solved for j", you get an inequality that shows the values that j must be greater than or less than.