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9 → 4+5
1 → 5-4
dinda = d
4/5 = l/d
l = 4/5d
d-l = 1500
d-4/5d = 1500
1/5d = 1500
d= 7500
l = 4/5 d
= 4/5. 7500
= 6.000
l + d = 7500 + 6000
= 13500