Answer:

Explanation:
First let's define the variable:
"a number" can be the x value.
The unknown quantity is x.
Then, we can write the equation:
fewer than a number x, is

It says this number is tripled, so the expression becomes

.
This expression is set equal to

So,

We can now solve:
First, add
to both sides:
The
gets canceled out.
We do
, which equals
.

Last, divide 3 from both sides to isolate x and get the answer:
÷
=
×
=

So,

I hope this helps!