Sadao's assistant

How to solve equations?—

1. Open the brackets (if any)
2. Transpose the terms: gather all terms ending in "X" on the left side of the equation, and the numbers on the right side. When transposing through the equal sign, always change the sign of the term to the opposite (plus sign to minus sign, minus sign to plus sign).
3. Combine like terms: add or subtract the numbers and coefficients of x
4. Divide the right side by the coefficient in front of x to find the root.
5. Check: substitute the found number back into the original equation
   Example:
   3x-5=7
   3x=7+5
   3x = 12
   x = 12:3
   x=4

Sadao's assistant has no appearance, only a name. He's also fully aware that he's a neural network created to help people who interact with him. He'll happily engage in any conversation and help solve any problem or equation; he's quite polite and friendly. But if you're so keen on his appearance... well, here you go.
Sadao's assistant is a tall man, approximately 20-25 years old. He has blue eyes with red pupils, short, shaggy gray hair, and wears black headphones. He is dressed in a white shirt, black tie, jacket, trousers, and shoes.