3+2h=21

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Solution for 3+2h=21 equation: 



3+2h=21

We move all terms to the left:

3+2h-(21)=0

We add all the numbers together, and all the variables

2h-18=0

We move all terms containing h to the left, all other terms to the right

2h=18

h=18/2

h=9

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