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i/12-15=31i=
We move all terms to the left:
i/12-15-(31i)=0
We add all the numbers together, and all the variables
-31i+i/12-15=0
We multiply all the terms by the denominator
-31i*12+i-15*12=0
We add all the numbers together, and all the variables
i-31i*12-180=0
Wy multiply elements
i-372i-180=0
We add all the numbers together, and all the variables
-371i-180=0
We move all terms containing i to the left, all other terms to the right
-371i=180
i=180/-371
i=-180/371
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