Answer:
w= -3.6
Step-by-step explanation:
w= -8.7+5.1 flip over the 8.7 and it becomes a negative
w = -3.6
Answer: -3.6
if 8.7 +w=5.1 we will subtract 8.7 from both side and we will get
w= 5.1-8.7
w=-3.6
