1

Problem

Find the value of a in the given equation:
-31 + a = 11

2

Step

The given equation

-31 + a = 11

3

Step

Starting with -31 + a = 11, we can add 31 to both sides to isolate a:

-31 + a + 31 = 11 + 31

4

Step

After simplification, we obtain a value

a = 42

5

Solution

So, the value of a is 42.

6

Sumup

Please Summarize Problem, Hint, Clue, Formula and Steps

Choices

7

Choice-A

This is obtained by adding 31 to 11, which would give us 42, not 20

Wrong 20

8

Choice-B

This is the correct calculation. Adding 11 and 31 gives us 42

Correct 42

9

Choice-C

This is an incorrect calculation. Adding 11 and 31 gives us 42, not 32

Wrong 32

10

Choice-D

This is obtained by subtracting 11 from 31, which would give us 20, not 28

Wrong 28

11

Step

Option

B

12

Sumup

Please Summarize Choices