Feat: Added solution for the assignment

[akshathkaushal]

Problem Statement

Given an input equation of the form A * B + C = D, with one of A, B, C, D containing a '?'. Find the value (integer) of '?' (-1 if no value can be found).

Approach

• Separate the values A, B, C, D
• Check for the '?' in each
• Appropriately solve the equation and find the missing number
• Compare the result with the given number and determine the value of '?'
• Insert conditions to check if the value of '?' can be defined or not
• If not, return -1

System requirements

• Node JS
• Code editor (optional)

Testing

Run using the command node Solution.js

Output (sample test cases)

This PR solves #172

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