Answer:
Explanation:
Here you go mate
Step 1
21g - 8 - 20g + 6 Equation/Question
Step 2
21g - 8 - 20g + 6 Simplify
21g - 8 - 20g + 6
Step 3
21g - 8 - 20g + 6 Combine terms
(21g+-20g)+(-8+6)
Step 4
(21g+-20g)+(-8+6) Add them
Answer
g-2
Hope this helps