Mathematics
Senior High
Solved
解答と違う計算の仕方なのですが
合っていますか?また、続きを教えてほしいです。
5
100
100≤x× +(1000-x) x ≤120 X
15
100
.. 2000≤x+3(1000-x) ≤2400
2000≤3000-2x≤2400
... 600≤2x≤1000
300≤x≤500
10
100
≤ xx
10
S
100
5
100
+ (1000-x) x
5 x 15 (1000-x)
100
100
<
15
100
12
100
10 ≤ 5x + 15000 - 15x < 12
10 = 15000-10x < 12
<
12
100
Answers
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