解不等式组,6x+15>2(4x+3),2x-1除3≥1除2x-2除3

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解不等式组,6x+15>2(4x+3),2x-1除3≥1除2x-2除3

解不等式组,6x+15>2(4x+3),2x-1除3≥1除2x-2除3
解不等式组,6x+15>2(4x+3),2x-1除3≥1除2x-2除3

解不等式组,6x+15>2(4x+3),2x-1除3≥1除2x-2除3
6x+15>2(4x+3)
6x+15>8x+6
9>2x
x=1/2x-2/3
2x-1/2x>=-2/3+1/3
3x/2>=-1/3
x>=-2/9
综上所述,解是-2/9

6x+15>2(4x+3)
6x+15>8x+8
2x<7
x<7/2
2x-1除3≥1除2x-2除3
两边乘6
4x-2≥3x-4
x≥-2
所以-2≤x<7/2

6x+15>2(4x+3)....1
2x-1/3≥1/2x-2/3......2
由1,可得
6x+15-8x-6=9-2x>0
即x<9/2.....3
由2,可得
2x-1/3-1/2x+2/3=3/2x+1/3≥0
即x≥-2/9....4
由3、4可得
9/2 > x≥-2/9