Respuesta:
a=15 b=3
Explicación paso a paso:
2a+3b= 39
a-b= 12
x2(a-b)=12
2a+3b=39 -
2a-2b=24
------------------
5b=15
b=3 a=15
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Respuesta:
a=15 b=3
Explicación paso a paso:
2a+3b= 39
a-b= 12
x2(a-b)=12
2a+3b=39 -
2a-2b=24
------------------
5b=15
b=3 a=15