I need help with this! :)

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

Zahra wants the equation below to have an infinite number of solutions when the missing number is placed in the box.

Alocal restaurant advertises that the mode cost of their most popular meals is $8. if the costs of their most popular meals are $7, $8, $8, $12, $13, $15, $17, $18, and $20, which word or phrase best describes this kind of advertising? accurate inaccurate accurate, but misleading inaccurate and misleading