[Toán 8] Giải bpt: 8x+2<7x-1

C

chaytheobagac_timxaccuaanh

8x+2<7x-1
\Leftrightarrow8x+2-7x+1<0
\Leftrightarrow x +3 <0
\Leftrightarrowx <-3
2,
3x+5<5x-7
\Leftrightarrow-2x-2 <0
\Leftrightarrow -2x <2
\Leftrightarrow x>-1
 
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