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2i/5-3=7
We move all terms to the left:
2i/5-3-(7)=0
We add all the numbers together, and all the variables
2i/5-10=0
We multiply all the terms by the denominator
2i-10*5=0
We add all the numbers together, and all the variables
2i-50=0
We move all terms containing i to the left, all other terms to the right
2i=50
i=50/2
i=25
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