7 answers
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1. 3i+2i−7=18 - Solution: i=5
2. 3(2i−7)=15 - Solution: i=6
3. 3i+5=2i−7 - Solution: No solution
4. 3i+5=3i+7 - Solution: No solution
5. 3(2i+7)=6i+21 - Solution: i=0