0.3 c = 20 + 0.25 d
0.3 d = 8 + 0.2 c
1) 0.45 d = 12 + 0.3 c
Подставляем значение вместо 0.3 с
0.45 d = 12 + 20 + 0.25 d
0.2 d = 32
d = 160
0.3 * 160 = 8 + 0.2 c
48 = 8 + 0.2c
0.2 c = 40
c = 200
Ответ: d = 160, c = 200
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Answers & Comments
0.3 c = 20 + 0.25 d
0.3 d = 8 + 0.2 c
1) 0.45 d = 12 + 0.3 c
Подставляем значение вместо 0.3 с
0.45 d = 12 + 20 + 0.25 d
0.2 d = 32
d = 160
0.3 * 160 = 8 + 0.2 c
48 = 8 + 0.2c
0.2 c = 40
c = 200
Ответ: d = 160, c = 200