SOLUTION: In the product B2�7B=6396, B is a digit. The value B = a. 8 b. 7 c. 6 d. 5 e. None of these

Question 146640: In the product B2�7B=6396, B is a digit. The value B =
a. 8
b. 7
c. 6
d. 5
e. None of these

Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
If we multiply B2*7B, our first step would be to multiply the last digit in 7B and the last digit in B2 to get 2*B. Since B is a single digit, we know that 2*B is going to be at most 18 (since 9 is the largest that B can be and 2*9=18). So if we subtract 10 off 2*B the largest that 2*B-10 is now 8 (which means that we now can say that 2*B-10 is equal to a single digit).

So this means that

Add to both sides.

Combine like terms on the right side.

Divide both sides by to isolate .

Reduce.

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Answer:

So the answer is

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