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x + 3 - 7x = - 40 + 7
3 - 6x = - 33
3 + 33 = 6x
36 = 6x
36/6 = x
6 = x
Respuesta .
x = 6
x+3-7x= - 40+7
3 - 6x= - 40+7
3 - 6x = - 33
3 + 33 = 6x
36 = 6x
6 = x