Solve for y
-9/x+7 = y/-x-7

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

What is the value of x in the following equation. -x ^3/2 = -27

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.