the final cost ,including tax of buying a pair of jeans is 37.82 if the tax was 6.5% what is the pre-tax cost of the jeans
Let x be the pre-tax cost of the jeans.
Then, the amount of tax is 0.065x.
The final cost, including tax, is x + 0.065x = 1.065x.
We know that this final cost is $37.82, so we can set up the equation:
1.065x = 37.82
Solving for x:
x = 37.82/1.065
x = 35.50
Therefore, the pre-tax cost of the jeans is $35.50.