You need to apply your knowledge of linear equation in one variable.
The mathematical expressions of the above statements can written as follows.
We were given the number to be
[tex]N[/tex]
Three times this number is
[tex]3 \times N = 3N[/tex]
Then 15 less than 3 times the number will be
[tex]3N - 15[/tex]
Now if we add N to 15 less than 3 times itself we get 101. This means that,
[tex]N + (3N - 15) = 101[/tex]
The above equation can be used to find the value of
[tex]N[/tex]
