Question

What unknown digit makes this edition problem true
356,312+43_ ,938=791250

a)4
b)5
c)3
d)6

Answer 1

To find the unknown digit in the equation \( 356312 + 43\_938 = 791250 \), we will represent the unknown digit as \( x \).

The equation can then be expressed as:
\[
356312 + 43x938 = 791250
\]

First, we'll isolate \( 43x938 \) by subtracting \( 356312 \) from both sides:
\[
43x938 = 791250 - 356312
\]

Next, we calculate the right side:
\[
791250 - 356312 = 434938
\]

Now we can equate:
\[
43x938 = 434938
\]

By comparing both sides, we can observe that \( x \) must be equal to 4, since:
\[
434938 = 4344938
\]

Thus, the unknown digit \( x \) is \( 4 \).

Final answer:
**a) 4**