Answer:
The number is 5
Step-by-step explanation:
First of all we have to convert the given scenario in mathematical or algebraic expression.
Let x be the number
Then according to given statement, the equation will be:
"Three times a certain number"
[tex]3x[/tex]
"is added to 5"
[tex]3x+5[/tex]
"the result is 20"
[tex]3x+5 = 20[/tex]
Using Subtraction property of Equality
[tex]3x+5-5 = 20-5\\3x = 15[/tex]
Using division property of equality
[tex]\frac{3x}{3} = \frac{15}{3}\\x = 5[/tex]
Hence,
The number is 5
