Step-by-step explanation:
[tex]d+4<7[/tex]
Solve for d, by subtracting 4 from both sides.
[tex]d+4-4<7-4[/tex]
[tex]d<3[/tex]
To graph the solution, draw a number line, make a hollow circle on 3 and draw an arrow pointing left towards negative numbers. The circle has to be hollow because the solution does not include 3.
To check your work, substitude d for any number less than 3. In this case, let's try with 2.
[tex]d+4<7\\2+4<7\\6<7[/tex]
This is true. 7 is greater than 6.
