I am not sure because there is no info about what is rate of decay
I assume if there is rate of decay is constant every hour then 0-2 it is
It 1/4th
So for 1st hour it is 933 gram
In order to get h alone, you must eliminate the 40. So to do this, you must subtract the 40 (as you always do the opposite operation, and if there isn't one, it is always positive), and this becomes 55h=150.
To find out what h is, you then divide both sides by 55. 55h/55=h
150/55= 2.727
Therefore, h=2.727
HOpe this helps :)
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