I need to make $500 per week after tax in order to pay all my bills. The income tax is 20%. What is the smallest pre-tax weekly salary I can earn and still be able to pay my bills after I pay my income tax?
+308 x * (100-20)% = 500
x * 80% = 500
4/5 * x = 500
4x = 2500
x = 625
