0.75:X=0.8:3.4
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0.75:X=0.8:3.4
0.75:X=0.8:3.4
0.75:X=0.8:3.4
0.75:X=0.8:3.4
0.8X=0.75×3.4
0.8X=2.55
X=3.1875
根据内项积=外项积得:
0.8x=2.55
x=3.1875
答案是x=3.1875
0.75:X=0.8:3.4
0.75x+25= 0.8x-20
4.2-0.8x=3.4x,
X+0.8X=?
4x(0.8+x)=7.2, 0.75x+6=2x
2.6x-x-0.1x=0.75
x+13%x-28%x=3.4
x+0.13x-0.28x=3.4
x-0.8x=16 x=?
0.8x=x-30 x=
x-0.8x=0.4x=?
X-0.8X=6 X=?
17x+13=7x+38 1.9+0.75x-0.1=x 13x-3x=72=12x=30 9.4x-120=8.4x=17x-200 15.2x-0.8=7.4x+70.9x-0.5x+0.28=x+0.1
x-0.8x=0.8
0.75x+x=17.5
x-25%x=0.75
x-0.75x=1.
x+3.4x=28.6