Answer:
7d - 4 + 3 - 2d = 5d - 1
Explanation:
To simplify the expression on the left-hand side, we add the numbers to numbers and the variables to variables.
The rearranging the addition on the left-hand side gives
[tex](7d-2d)+(-4+3)[/tex][tex]=5d-1[/tex]
Hence, we see that
[tex]7d-4+3-2d=5d-1[/tex]
therefore, the term to be put on the blue line is 5d.
