Job Recruitment Website - Recruitment portal - One-dimensional linear equation (with process)

One-dimensional linear equation (with process)

The first question won't

2 choose a, let a, x and b be 2X.

20( 1 \ X+ 1 \ 2X)= 1

X=30

A fee of 30X 1000 B fee of 550X60.

So a saves money.

There seems to be something wrong with question 3. There is no need to calculate the cost-benefit of company A, but B can make a mistake and work out the equation for several years.