What is the equation you get whenever you combine the top 2 equations x + 4y – 3z = -7
2x – 4y + 4z = 2
-6x + 4y + 4z = -14

Plzzz helppp

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?

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

Ineed me i stuck and i don’t want to get it wrong