20,45–2,5x20,45 – 2,5x20,45–2,5x – 3,2 = 15
20.45 – 2.5x – 3.2 = 15
– 2.5x = – 20.45 + 3.2 + 15
– 2.5x = – 2.25
Ответ: x = 0,9
20,45–2,5x20,45 – 2,5x20,45–2,5x – 3,2 = 15
20.45 – 2.5x – 3.2 = 15
– 2.5x = – 20.45 + 3.2 + 15
– 2.5x = – 2.25
Ответ: x = 0,9