#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#