71. Решите уравнение.

Привет! Давай решим уравнения из №71. Левый столбец: 1) -7x = 63 => x = 63 : (-7) => x = -9. 2) 3/4 * x = -2/3 => x = -2/3 * 4/3 => x = -8/9. 3) |-2,4| + y = |-0,4| => 2,4 + y = 0,4 => y = 0,4 - 2,4 => y = -2. 4) 3 7/11 - x = 3 13/22 => 40/11 - x = 79/22 => x = 80/22 - 79/22 => x = 1/22. 5) |-2,7| : y = |0,3| => 2,7 : y = 0,3 => y = 2,7 : 0,3 => y = 9. 6) x : |-5/16| = 2 => x : 5/16 = 2 => x = 2 * 5/16 => x = 5/8 = 0,625. 7) |-15,6| : t = -3,2 => 15,6 : t = -3,2 => t = 15,6 : (-3,2) => t = -4,875. 8) x * 1 3/5 = 8 1/2 => x * 8/5 = 17/2 => x = 17/2 * 5/8 => x = 85/16 = 5 5/16. Правый столбец: 1) x + |-0,75| = 1 => x + 0,75 = 1 => x = 0,25. 2) x - |1/20| = |-11,7| => x - 0,05 = 11,7 => x = 11,75. 3) |-5/2| * y = 0 => 2,5 * y = 0 => y = 0. 4) t : |-2,5| = -5/16 => t : 2,5 = -5/16 => t = -5/16 * 2,5 = -5/16 * 5/2 = -25/32. 5) |-5/6| + x = |2/3| => 5/6 + x = 2/3 => x = 2/3 - 5/6 = 4/6 - 5/6 = -1/6. 6) t - 1 4/5 = 41,2 => t - 1,8 = 41,2 => t = 43. 7) |-4,2| : |t| = |1,4| => 4,2 : |t| = 1,4 => |t| = 4,2 : 1,4 = 3 => t = 3 или t = -3. 8) |5,8| : x = -2,9 => 5,8 : x = -2,9 => x = 5,8 : (-2,9) = -2.