5x+4=-1 3x+2=2x-4 4x+6=5X-7 6X+8=4X-2 X-5=7X+4 /2X-3/=7_数学解答

5x+4=-1 3x+2=2x-4 4x+6=5X-7 6X+8=4X-2 X-5=7X+4 /2X-3/=7

人气：240 ℃　时间：2019-08-31 09:02:38

解答

1.5x+4=-1==>5X=-5==>X=-12.3x+2=2x-4==>X=-4-2=-63.4x+6=5X-7==>X=6-(-7)=134.6X+8=4X-2 ==>2X=-2-8==>X=-55.X-5=7X+4==>6X=-5-4==>X=-3/26./2X-3/=7==>2X-3=7或2X-3=-7,即X=5或者X=-2