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8.1+(-1.8h)=-7.2
We move all terms to the left:
8.1+(-1.8h)-(-7.2)=0
We add all the numbers together, and all the variables
(-1.8h)+15.3=0
We get rid of parentheses
-1.8h+15.3=0
We move all terms containing h to the left, all other terms to the right
-1.8h=-15.3
h=-15.3/-1.8
h=8+0.9/1.8
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