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1/210h=40
We move all terms to the left:
1/210h-(40)=0
Domain of the equation: 210h!=0We multiply all the terms by the denominator
h!=0/210
h!=0
h∈R
-40*210h+1=0
Wy multiply elements
-8400h+1=0
We move all terms containing h to the left, all other terms to the right
-8400h=-1
h=-1/-8400
h=1/8400
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