Уравнение для решения задачи: {5}
Поезд за три дня проехал 1380 км. Во второй день он проехала на
150 км меньше, чем в третий, а в третий день – в 4 раза больше,
чем в первый. Сколько километров проезжал поезд каждый день?
топтштриптиі
gerastern
3
24.12.2020 11:56
0
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2
1 день - x \
2 день - 4x - 150 } - 1380км
3 день - 4x /
x км - 1 день
Отсюда:
x + 4x + 4x - 150 = 1380
9x = 1380 + 150
9x = 1530
x = 170
1) 170(км) - за 1 день
2) 4 × 170 - 150 = 530(км) - за 2 день
3) 4 × 170 = 680(км) - за 3 день