Respuesta:
A= 345
B= 420
Explicación paso a paso:
5a+4b=3405
3a+5b=3135
X(-3)= - 15a-12b=-10215
X5. = +15a+25b=+15675
13b=5460
B=420
5a+4.420=3405
5a+1680=3405
5a=1725
a=1725:5
a=345
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Respuesta:
A= 345
B= 420
Explicación paso a paso:
5a+4b=3405
3a+5b=3135
X(-3)= - 15a-12b=-10215
X5. = +15a+25b=+15675
13b=5460
B=420
5a+4.420=3405
5a+1680=3405
5a=1725
a=1725:5
a=345