Пошаговое объяснение:
1) Одно число - х, другое - у.
x/y = 2/5 = 0.4
(x-5)/(y-5) = 1/5 = 0.2
x = 0.4y
(0.4y-5)/(y-5) = 0.2
0.4y - 5 = 0.2y - 1
0.2y = 4
y = 20
x = 8
2) x + y = 308
0.2x = 0.5y
x = 308 - y
0.2(308-y) = 0.5y
61.6 - 0.2y = 0.5y
0.7y = 61.6
y = 88
x = 220
Пошаговое объяснение:
1) Одно число - х, другое - у.
x/y = 2/5 = 0.4
(x-5)/(y-5) = 1/5 = 0.2
x = 0.4y
(0.4y-5)/(y-5) = 0.2
0.4y - 5 = 0.2y - 1
0.2y = 4
y = 20
x = 8
2) x + y = 308
0.2x = 0.5y
x = 308 - y
0.2(308-y) = 0.5y
61.6 - 0.2y = 0.5y
0.7y = 61.6
y = 88
x = 220