Respuesta:
5x+12,8=4,5x+20,2
5x+4,5x=20,2-12,8
9,5x=7,4
x=9,5-7,4
x=2,1
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Respuesta:
5x+12,8=4,5x+20,2
5x+4,5x=20,2-12,8
9,5x=7,4
x=9,5-7,4
x=2,1