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100+35j=72+42j
We move all terms to the left:
100+35j-(72+42j)=0
We add all the numbers together, and all the variables
35j-(42j+72)+100=0
We get rid of parentheses
35j-42j-72+100=0
We add all the numbers together, and all the variables
-7j+28=0
We move all terms containing j to the left, all other terms to the right
-7j=-28
j=-28/-7
j=+4
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