解不等式组90x+40(50-x)≤3600.30x+100(50-x)≤2900)要有过程.

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解不等式组90x+40(50-x)≤3600.30x+100(50-x)≤2900)要有过程.解不等式组90x+40(50-x)≤3600.30x+100(50-x)≤2900)要有过程.解不等式组9

解不等式组90x+40(50-x)≤3600.30x+100(50-x)≤2900)要有过程.
解不等式组90x+40(50-x)≤3600.30x+100(50-x)≤2900)
要有过程.

解不等式组90x+40(50-x)≤3600.30x+100(50-x)≤2900)要有过程.
90x+40(50-x)≤3600 1)
30x+100(50-x)≤2900 2)
由1),得
90x+2000-40x≤3600
50x≤1600
x≤32
由2),得
30x+5000-100x≤2900
-70x≤-2100
x≥30
所以不等式组的解集为
30≤x≤32