SOLUTION: You bought 3 books for $22.50 at a 7% tax rate. How much was the tax?

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Question 446334: You bought 3 books for $22.50 at a 7% tax rate. How much was the tax?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = cost of 3 books before tax
+x+%2B+.07x+=+22.5+
+1.07x+=+22.5+
+x+=+22.5%2F1.07+
+x+=+21.03+
The tax was
+.07x+=+.07%2A21.03+
+.07%2A21.03+=+1.47+
The tax was $1.47 for 3 books