Ответ: -56
3*(-7) - 7*|-7+5|+12 = -21 - 7*2 + 12 = -21 - 14 + 12 = -35 + 12 = -23
3x - 7|x+5| + 12 = 3*(-7) - 7*|-7+5| + 12 = -21 - 7*|-2| + 12 = -21 - 14 + 12 = -35+12 = -23
3x - 7|x+5|+12, если x = -7
3*(-7) - 7*|-7+5|+12 =
-21 - 7*|-2|+12 =
-21 - 7*2+12 =
-21 - 14+12 = -23
3⋅(−7)−7⋅∣−7+5∣+12=
−21−7⋅∣−2∣+12=
−21−7⋅2+12=
−21−14+12=
−35+12=−23
Ответ: -23