Answer :
Let's analyze the problem step by step:
1. Mr. Dorsey buys 3 pajama sets, and during the sale each set is marked down by \[tex]$7. This means that if the full price of a set is $[/tex]f[tex]$, then the sale price for one set is
$[/tex][tex]$f-7.$[/tex][tex]$
2. Since he buys 3 sets, the total amount he pays will be 3 times the sale price. This gives us the equation:
$[/tex][tex]$3(f - 7) = 57.$[/tex][tex]$
3. The equation above represents the situation correctly. Therefore, the correct equation is
$[/tex][tex]$\boxed{3(f-7)=57}.$[/tex]$
1. Mr. Dorsey buys 3 pajama sets, and during the sale each set is marked down by \[tex]$7. This means that if the full price of a set is $[/tex]f[tex]$, then the sale price for one set is
$[/tex][tex]$f-7.$[/tex][tex]$
2. Since he buys 3 sets, the total amount he pays will be 3 times the sale price. This gives us the equation:
$[/tex][tex]$3(f - 7) = 57.$[/tex][tex]$
3. The equation above represents the situation correctly. Therefore, the correct equation is
$[/tex][tex]$\boxed{3(f-7)=57}.$[/tex]$