first we need to isolate the variable so we add 15 to both sides which is w/4=43 then we need to multiply by 4 to both sides so its 4w=172 then divide by 4 which is 43 so the answer is w=43
Step 1 - w/4 + 15 = 28 -15 -15 (1st) ----------------------------- (4) -w/4= 13(4) (2nd) -w=52 Divide both side by -1 to isolate w and you get W = -52 (Answer)