PLEASE HELP ME Complete the equation with a number that makes the expression on the right side of the equal sign equivalent to the expression on the left side.

5x−2.5+6x−3=–(2x−1)

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