Does (-7, 2) make the equation y = x true?

(don't send a link just tell me the answer)

What is the common difference in the following arithmetic sequence 7,3,-1,-5

Aboard game uses a fair six-sided die and a spinner with five equal-sized sections colored dark blue, green, light blue, red, and yellow. players roll the die and then spin the spinner. match each probability statement to its correct value.

How do you solving the solution of each system using elimination?