If a, b, and c are digits for which
7 a 2
-4 8 b
=========
To find the values of a, b, and c, let's solve the equation.
The given equation is:
7 a 2
-4 8 b
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To solve this, we'll use the method of subtraction.
Starting from the rightmost digit, subtract 2 from 8, which gives you 6.
7 a 2
-4 8 b
6
Now, moving to the tens place, subtract 4 from 7. Since 7 is smaller than 4, we need to borrow from the hundreds place. So, we subtract 1 from a, which gives us a - 1, and increase 7 to 17. Then, subtract 4 from 17, which gives us 13.
17 a 2
-4 8 b
6
Moving to the hundreds place, subtract 4 from a - 1. Since a - 1 is smaller than 4, we need to borrow from the thousands place. So, we subtract 1 from 2, which gives us 1, and increase a - 1 to a - 1 + 10, which gives us a + 9. Then, subtract 4 from a + 9, which gives us a + 5.
1 7 a 2
-4 8 b
6
Lastly, subtract 1 from 7, which gives us 6.
1 6 a 2
-4 8 b
6
Now we have:
16 a 2
-48 b
6
To determine the values of a, b, and c, we need more information.