Feel free to change it up a little. Sam and his friend went out for pancakes. They ordered a huge stack of pancakes but the waitress didn't give them enough maple syrup. Sam got 1/5 of a cup of syrup and his friend got 1/2 of a cup. If they wanted a lot of syrup, they would have to combine their cup of syrup. How much syrup would they have if they combined their cups of syrup?
Now solve. First, find the common denominator 10 is the common denominator 1/5=2/10 1/2=5/10 2/10+5/10=7/10
Sam and his friend has 7/10 cups of syrup, now they have enough and are satisfied
Let the number be a ....
=>Number doubled : 2a ..
=>Eight less than the no. Doubled : 2a - 8
=>Eight less than the no. doubled is 20 more than the no. : 2a - 8 = 20 + a
=>2a - 8 - 20 - a = 0
=>2a -a - 20 -8 = 0
=>a -28 = 0
=>a = 28
=>so the number is 28...
Hope it helps!!!