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2x + 3y = 33.000
1y + 3y = 33.000
4y = 33.000
y = 33.000 : 4
y =8.250
x = 8.250 : 2
= 4.125
5x + 3y = 5 × 4.125 + 3 × 8.250
= 20.625 + 24.750
= 45.375
jadi delon harus membayar 45.375