40i+120=720

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Solution for 40i+120=720 equation: 



40i+120=720

We move all terms to the left:

40i+120-(720)=0

We add all the numbers together, and all the variables

40i-600=0

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

40i=600

i=600/40

i=15

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