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-1.8h+8.1=7.2
We move all terms to the left:
-1.8h+8.1-(7.2)=0
We add all the numbers together, and all the variables
-1.8h+0.9=0
We move all terms containing h to the left, all other terms to the right
-1.8h=-0.9
h=-0.9/-1.8
h=0.9/1.8
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