Heidi, a jewelry salesperson, earns a commission of $55 every time she sells a diamond ring. how many rings does she have to sell to earn $605? choose the equation that correctly calculates the amount.
a. $605 – $55 = w
b. $55 w = $605
c. $55 × w = $605
d. $55 – w = $605 – w

B and c are correct
If we use w for the number of rings she sells we might ask:
$55  times how many rings she sells (w) gets her $605 in commissions.
$55 x w = $605
or you may skip the times sign (x) because when number appears next to a variable (such as w) they are connected by multiplication
so
$55w = $605 is the same thing as $55 x w = $605.

Think of it as five or above give it a shove. change the 5 or above to the right to a zero and add one to the number on the left.