Sam a resident of Metropolis pays Metropolis an annual tax o

Sam, a resident of Metropolis, pays Metropolis an annual tax of $75 plus 1.6% of his annual income. If Sam paid $1,115 in tax, what was Sam\'s income

Solution

Let Sam\'s annual income be $ x .

Total tax paid by him = $ 75 + (1.6 % of x ) , which is also equal to $ 1,115.

i.e. $ 75 + (1.6/100)x = $ 1,115

=> (1.6/100)x = $ 1,115 - $ 75 = $ 1,040

=> x = $ (1,040 *100)/1.6 = $ 65,000

So, Sam\' income = $ 65,000