Now consider the family of lines ax + by = c such that a, b and c are consecutive multiples of each other. what would that mean? give some examples of such lines in this family (coordinates.) what do you notice or wonder?

The answer is (-1,2).

Step-by-step explanation:

Try determining it by making up specific examples.  

You might try x+2y = 3 (1,2,3 is an arithmetic progression with a

difference of 1).  

The 2nd equation might be 5x+7y = 9. Now solve this system of equations using elimination or substitution method. Try this with a few different specific examples, just to convince yourself.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

answer

step-by-step explanation: