How to change the fractions into equivalent fractions having the LCD 3/4

Solve the word problem. the table shows the low outside temperatures for monday, tuesday, and wednesday. by how many degrees did the low temperature increase from monday to tuesday? this function table shows the outside temperature for a given a. 21.1⁰ b. 8.6⁰ c. 4.9⁰ d. 3.9⁰(the picture is the graph the the question is talking about.)

Ineed with this problem 21 show steps

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"