2x-3≥5(x-3) 2x-3≥5x-15 2x-5x≥-15+3 -3x≥-12 x≤4
(y-1)/6-(y+1)/3>1 y-1-2(y+1)>6 y-1-2y-2>6 y-2y>6+1+2 -y>9 yx+3……① 2x+7≥3x+6……② 4x-1≥5x-3……③
由①得:x>-1;由②得:x≤1;由③得:x≤2
∴不等式组解集为:-1
2x-3≥5(x-3) 2x-3≥5x-15 2x-5x≥-15+3 -3x≥-12 x≤4
(y-1)/6-(y+1)/3>1 y-1-2(y+1)>6 y-1-2y-2>6 y-2y>6+1+2 -y>9 yx+3……① 2x+7≥3x+6……② 4x-1≥5x-3……③
由①得:x>-1;由②得:x≤1;由③得:x≤2
∴不等式组解集为:-1