3(i+7)=45

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Solution for 3(i+7)=45 equation: 



3(i+7)=45

We move all terms to the left:

3(i+7)-(45)=0

We multiply parentheses

3i+21-45=0

We add all the numbers together, and all the variables

3i-24=0

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

3i=24

i=24/3

i=8

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