Casio fx-9860GII - 1.5 Solving simultaneous linear equations in three unknowns

Getting Started with the fx-9860GII
7. To calculate (-3 + 2i ) + 15i; enter the following:
• iejn3+2qk+15ql
Sigma calculations can also be performed in the RUN menu.
8. To calculate
; enter the following:
 • iruea,s3a,+5$a,$2B6l
RUN
5