0.5x=0.75(1000-x)

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0.5x=0.75(1000-x)0.5x=0.75(1000-x)0.5x=0.75(1000-x)0.5x=0.75(1000-x)2x=3(1000-x)2x=3000-3x2x+3x=3000

0.5x=0.75(1000-x)
0.5x=0.75(1000-x)

0.5x=0.75(1000-x)
0.5x=0.75(1000-x)
2x=3(1000-x)
2x=3000-3x
2x+3x=3000
5x=3000
x=600

600

0.5x=0.75*1000-0.75x
0.5x+0.75x=750
1.25x=750
x=600

0.5x=0.75(1000-x) 0.5x-6=0.75x 0.75x+0.5x=2.25 (1000-x)×0.3-0.5x=260 (1000-x)×0.3-0.5x=260 （X+X)+(X-X)+(X*X)+(X/X)=100 2.6x-x-0.1x=0.75 x+1000-x=1000,x=? 0.5X+120+0.3X=X 4X+0.5X=13.5X x-30-0.2x=0.5x x-0.3x-0.5x=20 9x+0.5x+x= X+0.3X=1000 求X? X=28.1%*(1000+X)求X 0.75x+x=17.5 x-25%x=0.75 x-0.75x=1.