40
I guess you mean: What number when you subtract 20, gives 40 as the answer?x - 20 = 40.Add 20 to both sides: x - 20 + 20 = 40 + 20x = 60
Number of neutrons = mass number - atomic number = 40 - 20 = 20 neutrons
the percent of a number is when you multiply the percentage by the number, for example: 8% of 40 40 x 0.08= 20% or 20% of 40 0.20 x 40=8%
8 / 0.2 = 40 Therefore, the number that 8 is 20 percent of is 40.
8 is 40% of 20
8 / 0.4 = 20 Therefore, 8 is 40 percent of 20.
These may help you answer your questions: 1, 2, 4, 5, 8, 10, 20 and 40.
20 less than 2 times a number is 40 = 2x - 20 = 40Let x = the number2 times a number = 2x20 less than = - 20is 40: =40Translating it into mathematical symbols :2x - 20 = 40
To find the number that 20 is 40% of, you can set up a proportion. Let x be the number we are trying to find. The proportion would be: 20/x = 40/100. Cross multiplying gives us 100 * 20 = 40 * x. Simplifying this equation, we get x = 200 / 40 = 5. Therefore, 20 is 40% of the number 50.
20 is 40% of 50
8
If half of the number is 20, then the number must be 2 * 20 = 40. Therefore three quarters of the number would be 3 * (40/4) = 30.