What is the coefficient in the expression 3-15r?

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤

Using elimination, what is -4x+2y=-12 4x+8y=-24

Which of the following equations is equivalent to x/3-6/x=1