One number is less than a second number. Twice the second number is 42 more than 4 times the first?

Any pair of numbers (x, 21 + 2x).

Step-by-step explanation:

I am going to solve this question building a system of equations. We have that:

The first number is x

The second number is y.

Twice the second number is 42 more than 4 times the first

This means that:

2y = 42 + 4x

Dividing by 2

y = 21 + 2x

So the solution to this question is:

Any pair of numbers (x, 21 + 2x).