SOLUTION: if the sales tax is 5% and the purchase price is $161, what is the amount of tax

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Question 724362: if the sales tax is 5% and the purchase price is $161, what is the amount of tax
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The purchase price includes the tax, so
$161 = pre-tax price + tax
Let +x+ = the pre-tax price
+x+%2B+.05x+=+161+
+1.05x+=+161+
+x+=+161%2F1.05+
+x+=+153.333+
+.05x+=+.05%2A153.333+
+.05x+=+7.67+
The tax is $7.67