Respuesta:
43
Explicación paso a paso:
Billetes de 50: x
Billetes de 20: 50-x
50x +10(50-x) = 780
50x +500-10x = 780
40x = 280
x = 7
Billetes de 20: 50-7 = 43
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Verified answer
Respuesta:
43
Explicación paso a paso:
Billetes de 50: x
Billetes de 20: 50-x
50x +10(50-x) = 780
50x +500-10x = 780
40x = 280
x = 7
Billetes de 20: 50-7 = 43