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⇒3A+4a=180.000
(x10)
⇒4A+5a=230.000
3A+4a=180.000|4|12A+16a=720.000
4A+5a=230.000|3|12A+15a=690.000 (-)
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a=30.000
3A+4a=180.000
3A+4(30.000)=180.000
3A+120.000=180.000
3A=60.000
A=20.000
∴Andre=Rp 20.000,-
ali=Rp 30.000,-
(((jadikan jawaban sebagai jawaban tebaek ea)))