Sharon earns 4% commission on the items that she sells one week she earns $150 in commission what is the total value of the items that she sold

X = total sales
y = sharon's commision earnings

Since Sharon makes 4% of the total sales, we want to calculate how many sales equate to a $150 return. Since 4% = .04, the solution would be :

y = .04 x
150 = .04 x
150/.04 = x
3750 = x