Answer :
Let [tex]$b$[/tex] be the number of guests who choose a bowl of soup. Since there are 35 guests in total and each guest chooses either a salad or a bowl of soup, the number of salads [tex]$s$[/tex] that Raj needs to prepare is given by the equation
[tex]$$
s = 35 - b.
$$[/tex]
If 21 guests choose a bowl of soup (i.e., [tex]$b = 21$[/tex]), substitute this value into the equation:
[tex]$$
s = 35 - 21.
$$[/tex]
Performing the subtraction:
[tex]$$
s = 14.
$$[/tex]
Thus, Raj needs to prepare 14 salads.
[tex]$$
s = 35 - b.
$$[/tex]
If 21 guests choose a bowl of soup (i.e., [tex]$b = 21$[/tex]), substitute this value into the equation:
[tex]$$
s = 35 - 21.
$$[/tex]
Performing the subtraction:
[tex]$$
s = 14.
$$[/tex]
Thus, Raj needs to prepare 14 salads.