Question

Help I don't get it​

Answer 1

7j

Combine like terms

Answer 2

7j

Step-by-step explanation (all you're doing is combining like terms):

1. 6j + 2j = 8j
2. 8j - 4j = 4j
3. 4j - 6j = -2j
4. -2j + 9j = 7j

I hope this helps!