I know none of these are actually the answer but odysseyware gave me credit for
(4,2)
16 is the answer to this question.
Answer:The answer for number 3 is 240
Step-by-step explanation:

change

given you

making x the subject by transferring the -19 to the right hand side of the equation


dividing through by 5


{
}
also given

change the operation sign to =



dividing through by -4


so the truth set is
{x:x>9/4}.
The < sign changes to > because we divided by a negative number when solving for x