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-643=h+-516
We move all terms to the left:
-643-(h+-516)=0
We add all the numbers together, and all the variables
-(h-516)-643=0
We get rid of parentheses
-h+516-643=0
We add all the numbers together, and all the variables
-1h-127=0
We move all terms containing h to the left, all other terms to the right
-h=127
h=127/-1
h=-127
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