Answer:
H = 40
Step-by-step explanation:
Step 1: Combine like terms
4H + 20 = 180
Step 2: Subtract 20 on both sides
4H = 160
Step 3: Divide both sides by 4
3H+20+H=180
4H+20=180
4H=180-20
H=160/4
H=40
