Face value only, unless it's crisp and uncirculated. Then it might retail for all of $12.
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Ten shillings...
Auction prices as of 02/2009: With a green seal, $12.-$20. depending on how worn it is. With a blue seal, $20.-$60.
It means that if you substitute b for a, c for b and a for c the value of the determinant remains unchanged.It means that if you substitute b for a, c for b and a for c the value of the determinant remains unchanged.It means that if you substitute b for a, c for b and a for c the value of the determinant remains unchanged.It means that if you substitute b for a, c for b and a for c the value of the determinant remains unchanged.
That depends on the value of x, and the value of c. The expression "x + c" can't be simplified, if that's what you mean.
The expression 2b - c represents the result of subtracting the value of c from twice the value of b. This can also be written as 2 multiplied by the variable b, then subtracting the value of c. The result will depend on the specific values of b and c.