а) a/3 + 400 = 600a/3 = 600 - 400a/3 = 200a = 3 * 200a = 600
Проверка:600/3 + 400 = 600200 + 400 = 600600 = 600
б) (500 - x) * 6 = 120500 - x = 120 / 6500 - x = 20-x = 20 - 500-x = -480x = 480
Проверка:(500 - 480) 6 = 12020 6 = 120120 = 120
в) 600 / 2 + n = 400300 + n = 400n = 400 - 300n = 100
Проверка:600 / 2 + 100 = 400300 + 100 = 400400 = 400
г) (600 - 500) + y = 200100 + y = 200y = 200 - 100y = 100
Проверка:(600 - 500) + 100 = 200100 + 100 = 200200 = 200
а) a/3 + 400 = 600
a/3 = 600 - 400
a/3 = 200
a = 3 * 200
a = 600
Проверка:
600/3 + 400 = 600
200 + 400 = 600
600 = 600
б) (500 - x) * 6 = 120
500 - x = 120 / 6
500 - x = 20
-x = 20 - 500
-x = -480
x = 480
Проверка:
(500 - 480) 6 = 120
20 6 = 120
120 = 120
в) 600 / 2 + n = 400
300 + n = 400
n = 400 - 300
n = 100
Проверка:
600 / 2 + 100 = 400
300 + 100 = 400
400 = 400
г) (600 - 500) + y = 200
100 + y = 200
y = 200 - 100
y = 100
Проверка:
(600 - 500) + 100 = 200
100 + 100 = 200
200 = 200