harianzialison
harianzialison
09-09-2016
Mathematics
contestada
solve: 3x 12-{2x-[5(x-3)-3]=3(x-5)
Respuesta :
nobillionaireNobley
nobillionaireNobley
09-09-2016
3x + 12 - {2x - [5(x - 3) - 3]} = 3(x - 5)
3x + 12 - {2x - [5x - 15 - 3]} = 3x - 15
3x + 12 - {2x - [5x - 18]} = 3x - 15
3x + 12 - {2x - 5x + 18} = 3x - 15
3x + 12 - {-3x + 18} = 3x - 15
3x + 12 + 3x - 18 = 3x - 15
6x - 6 = 3x - 15
6x - 3x = -15 + 6
3x = -9
x = -9/3 = -3
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