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5X十2=6X一4怎么解

5X+10=6X-12 -X=-22 X=22

3x-(5x-4)=2+(5-6x) 3x-5x+4=2+5-6x 4-2x=7-6x 6x-2x=7-4 4x=3 x=3/4 x=0.75

5x+2=y (1) 6x-4=y (2) 将y=5x+2带入(2)得 6x-4=5x+2 6x-5x=2+4 x=6 y=5x+2=5×6+2=32 即x=6,y=32

2Ⅹ一5x3.4=10.6 解:2X-17=10.6 2X=27.6 X=27.6÷2 X=13.8

5x+12=6x-12 6x-5x=12+12 x=24

5x一2=3x十10 5x-3x=10+2 2x=12 x=12÷2 x=6

解:5x+2.8*4=16.2 5x+11.2=16.2 5x=16.2-11.2 5x=5 x=1

先把它变形为分式方程,然后方程两边同乘30x 得:2.4 x 6-2.4 x 5=1.6 x 30x 解得:48x=2.4 x=1/20

5x+3=2*4+(x-2)*6 5x+3 = 8+6x-12 5x-6x = 8-12-3 -x=-7 x=7

x-2/5x加7.6等于4/5x 3/5x加7.6等于4/5x 4/5x-3/5x等于7.6 1/5x等于7.6 x等于1.52

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