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The answer is as follows: quick, quick, quick! ! !
4=k+b

5=k/4+b

What does the list method mean?

6x+4y=60

x+y= 1 1

I think you can work out this system of equations.

Design a problem situation, so that the problem can be solved by solving the binary linear equations {x-y = 22x+y = 7.

There are too many answers.

A has more 2 yuan than B. If A's money doubles, then they have 7 yuan. Q, how many are A and B respectively?