can someone help i have several questions like this i also need the work shown

Answer:
x = 8
Step-by-step explanation:
Create the expression:
10(x + 10) = 9(9 + 11)
Do PEMDAS (Parenthesis):
10(x + 10) = 9(20)
Do PEMDAS (Multiplication):
10x + 100 = 180
Cancel out:
10x + 100 = 180
-100 -100
10x = 80
Simpilfy:
x = 8