1. substitution
2. transitive property
Answer:
36.3 m
Step-by-step explanation:
because a decagon has 10 sides so 363 divided by 10=36.3
x = 8
x + y + 10 = 20
if y = 2,
=> x + 2 + 10 = 20
=> x + 12 = 20
=> x = 20 - 12
=> x = 8
