Answer:
w = -5
Step-by-step explanation:
Hello there!
9+7w-9=5w-10
Add 9 and -9 since we can add those
7w=5w-10
Use subtraction Prop of Equality (combining/simplifying like terms)
2w = -10
Now isolate the w by dividing 2w by 2 and use the division prop of equality
w = -5
Hope this helps. Feel free to comment for further explanation.
