Let n is an unknown number.
\The word
negative three times a number n plus 4
represents
.
The word
is less than
represents
.
The word
five times the number n plus 8
represents
.
The word
Negative three times a number n plus 4 is less than five times the number n plus 8
represents
.
The inequality is
.
Apply addition property of inequality: If
.
Add 5n to each side.
\

Apply subtraction property of inequality: If
.
Subtract 8 from each side.
\

Apply division property of inequality: If
.
Divide each side by 8.
\

The solution set is
.
Check:
\To check, substitute three different values for n into the original inequality:
, a number less than
, and greater than
.
Let three values are
.
If
then
(This is false)
If
then
(This is false)
If
then
(This is true).
The inequality is
and the solution set is
.