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30.4=h+4
We move all terms to the left:
30.4-(h+4)=0
We get rid of parentheses
-h-4+30.4=0
We add all the numbers together, and all the variables
-1h+26.4=0
We move all terms containing h to the left, all other terms to the right
-h=-26.4
h=-26.4/-1
h=26+0.4/1
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