Решение:
- 1) 3x = 36 - x \
4x = 36 \
x = 9 - 2) 13x + 24 = 9x \
4x = -24 \
x = -6 - 3) 8x + 5 = 5x + 29 \
3x = 24 \
x = 8 - 4) 7x - 4 = 4x + 17 \
3x = 21 \
x = 7 - 5) x + 2 = 5x + 18 \
-4x = 16 \
x = -4 - 6) 7 - 4x = 2x - 23 \
30 = 6x \
x = 5
Ответ: 1) x = 9; 2) x = -6; 3) x = 8; 4) x = 7; 5) x = -4; 6) x = 5.