19 + 4h = 1 - 5h
You need to get like terms together first by adding 5h to both sides
19 + 4h + 5h = 1 - 5h + 5h
19 + 9h = 1
Next subtract 19 from both sides
19 - 19 + 9h = 1 - 19
9h = -18
last step is to divide both sides by 9
9h/9 = -18/9
h = -2 is the answer