does anyone know how to do any of this? I really dont understand and need help. Thank you so much if you help! :))

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

With this question substitute t=3 and t=5 to determine if the two expressions are equivalent. 4(t + 3) 4t+12 which statements are true? check all that apply. a. the value of both expressions when t =5 is 32. b. the two expressions are not equivalent. c. the value of both expressions when t=3 is 15. d. the value of both expressions when t=5 is 23. e. the two expressions are equivalent. f. the value of both expressions when t=3 is 24.

Construct the graph that models the given situation