So the given angles are supplementary (add to 180). You take the two and add them. 21x+5+37x+1. This gets set to equal 180. 58x+6=180. Subtract 6 from both then divide by 58. You get x=3
Answer: the best answer is 3(-3a-1)
Step-by-step explanation:
Since the signs are different, you have to subtract. 2
