There is a really easy way to find this out I can't really help you so if you just look it up on google you should get your awnser
Answer:
B.
÷ 
Step-by-step explanation:
its a formula
Yes. I just did this question on a test actually
Hope this helps you out 3w+7=8
The answer is w= 1/3
Step by step:
3w+7=8
Step 1: is subtract is 7 from both sides.
3w+7-7=8-7
3w=1
Step 2: Divide both sides by 3.
3w/3 = 1/3
Your solution is:
w=1/3