x + 7 ≥ 0 x ≥ -7 x + 7 = x – 5 7 = -5 NŘ

x + 7 ≤ 0 x ≤ -7 -(x + 7) = x – 5 -x – 7 = x – 5 -2x = 2 x = -1 nesplňuje podmínku x < -7

NŘ