Respuesta:
3x+12=3
3x= 3 -12
3x= -9
x= -9/3
x= -3
2x+4=8
2x= 8-4
x= 4/2
x=2
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Respuesta:
3x+12=3
3x= 3 -12
3x= -9
x= -9/3
x= -3
2x+4=8
2x= 8-4
x= 4/2
x=2