X/5 = -2 solve for x

plz me asap

Which of the following will form the composite function?

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18

Talia grouped the terms and factored out the gcf of the groups of the polynomial 15x2 – 3x – 20x + 4. her work is shown below. (15x2 – 3x) + (–20x + 4) 3x(5x – 1) + 4(–5x + 1) talia noticed that she does not have a common factor. what should she do?