in the like term you can add directly and make it single fraction and in unlike term you have to take LCM of denominator .
2.66 is the speed
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Unless you're given the value of the variables, you can't really solve for anything. The only thing you can do is simplify.
<span>39+5h+4g-2h
The only like terms are 5h and -2h.
39 + 3h + 4g
This would be the simplified version.</span>