Question 196339
Let the income before taxes = {{{x}}}
The income after taxes will then be {{{x - .1*(x - 3000)}}}
The problem says the income after taxes is {{{12000}}}, so
{{{x - .1(x - 3000) = 12000}}}
{{{x - .1x + 300 = 12000}}}
{{{.9x = 12000 - 300}}}
{{{.9x = 11700}}}
{{{x = 13000}}}
The income before taxes was $13,000