15i-15=20i+4

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Solution for 15i-15=20i+4 equation: 



15i-15=20i+4

We move all terms to the left:

15i-15-(20i+4)=0

We get rid of parentheses

15i-20i-4-15=0

We add all the numbers together, and all the variables

-5i-19=0

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

-5i=19

i=19/-5

i=-3+4/5

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