Can you please help me :)

Sorry I dont have time to put all the answers but here is the answers for 1-4

1. n=24

n-8=16

using opposite rule

n=16+8

n=26

2. m=18

2m=36

opposite rule

m=36÷2

m=18

3. x=15

x+5=20

opposite rule

x=20-5

4. m=30

m=6×5

m=30

the answer is c)8

step-by-step explanaction:

the answer to this is a. a^2 + b^2 = c^2