16-4(x-3)≤2(x-1)
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16-4(x-3)≤2(x-1)16-4(x-3)≤2(x-1)16-4(x-3)≤2(x-1)16-4x+12≤2x-228+2=30≤2x+4x=6xx≥5两边除以28-2x+6≤x-13x≥15
16-4(x-3)≤2(x-1)
16-4(x-3)≤2(x-1)
16-4(x-3)≤2(x-1)
16-4x+12≤2x-2
28+2=30≤2x+4x=6x
x≥5
两边除以2
8-2x+6≤x-1
3x≥15
x≥5
(x+2)(x-2)+16 (x-1)(x-2)+3x(x+3)-4(x+2)(x-3)(x+2)(x-2)+16 (x-1)(x-2)+3x(x+3)-4(x+2)(x-3)
解九宫格题目(X为未知数)9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1
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