2(x+4)=18
2•x + 2•4 = 18
2x + 8 = 18
2x + 8 = 18
- 8 -8
_________
2x = 10
2x = 10
__ __
÷2 ÷2
x = 5
All you have to do is to determine the # of degrees covered in 1 hour. Divide "15 deg in 2 hrs" by 2; you'll get
(15/2) deg / 1 hr
First, do 36/12 to find out how many laps you can run in a certain amount of minutes. It is 1 laps per 3 minuted. Then, do 3 times 20 because 60 minutes is in an hour. Then, 1 times 20 is 20. 20 laps is the correct answer.
600,000 + 5,000 + 900 + 70
