Order of operations what should be done first to evaluate 6+ (-5-7) ÷ 2 -8(3)

(hurry! ) which expression is equivalent to the following complex fraction?

What is a possible solutions of the x> 3?

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36