Respuesta :

Panoyin
log4(x + 5) + 4x = log4
log4(x) + log4(5) + log4x = log4
log4x + log20 + log4x = log4
log4x + log4x + log20 = log4
log8x + log20 = log4
           -log20   -log20
0.903089987x = -0.6989700043
 0.903089987       0.903089987
                     x = -0.7739760316