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4i-4=7+1
We move all terms to the left:
4i-4-(7+1)=0
We add all the numbers together, and all the variables
4i-4-8=0
We add all the numbers together, and all the variables
4i-12=0
We move all terms containing i to the left, all other terms to the right
4i=12
i=12/4
i=3
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