4.28=frac{h+14.97}{-1}
-1** 4.28 =-1**frac{h+14.97}{-1} color(white)(aaa) Multiply both sides by -1
-4.28=cancel(-1)**frac{h+14.97}{cancel-1} color(white)(aaa)
-4.28=h+14.97
-14.97color(white)(aa)-14.97color(white)(aaa) Subtract 14.97 from both sides
-19.25=h