Answer:
−
4x−2
Step-by-step explanation:
So you make your equation 4x+20+40=180.
Add like terms and get 4x+60=180.
Subtract 60 from both sides, get 4x=120.
Divide boths sides by 4, get your answer of x=30.
Hope this helps
The distribution of the -4 was incorrectly put in as -4b when it should be 4b