Find the difference between - 1 3/4 and 2 1/4 on a number line

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)

Yo need asap pls ! markin da brainiest too !

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319