It's the (Saving Suzy Error Analysis Worksheet), Suzy solved a multi-step equation below, but she made a mistake

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

Which expression is equivalent to -5(3x - 6/7)

If you were constructing a triangular frame, and you had wood in the length of 4inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no. explain your mathematical thinking