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94.5-2x=6又1/2x+54.537又3/8-2又1/2x=4又1/2+21又3/84(x+5)=9x+12.50.9(x-3)-0.8x=2(3/4)*(84-x...
94.5-2x=6又1/2x+54.5
37又3/8-2又1/2x=4又1/2+21又3/8
4(x+5)=9x+12.5
0.9(x-3)-0.8x=2
(3/4)*(84-x)=1/2x+18
(x+4)/(0.4)=18
(13-x)/(21-x)=8/13
(4又1/2x-3)/(3x-1)=1/2 展开
37又3/8-2又1/2x=4又1/2+21又3/8
4(x+5)=9x+12.5
0.9(x-3)-0.8x=2
(3/4)*(84-x)=1/2x+18
(x+4)/(0.4)=18
(13-x)/(21-x)=8/13
(4又1/2x-3)/(3x-1)=1/2 展开
展开全部
94.5-2x=6又1/2x+54.5
6.5x+2x=94.5-54.5
8.5x=40
x=40÷8.5
x=4又12/17
37又3/8-2又1/2x=4又1/2+21又3/8
2.5x=37.375-4.5-21.375
2.5x=11.5
x=11.5÷2.5
x=4.6
4(x+5)=9x+12.5
4x+20=9x+12.5
5x=7.5
x=1.5
0.9(x-3)-0.8x=2
0.9x-2.7-0.8x=2
0.1x=4.7
x=47
(3/4)*(84-x)=1/2x+18
252-3x=2x+36
5x=216
x=4.32
(x+4)/(0.4)=18
x+4=18*0.4=7.2
x=3.2
(13-x)/(21-x)=8/13
8(21-x)=13(13-x)
168-8x=169-13x
5x=1
x=1/5
(4又1/2x-3)/(3x-1)=1/2
2(4.5x-3)=3x-1
9x-6=3x-1
6x=5
x=5/6
6.5x+2x=94.5-54.5
8.5x=40
x=40÷8.5
x=4又12/17
37又3/8-2又1/2x=4又1/2+21又3/8
2.5x=37.375-4.5-21.375
2.5x=11.5
x=11.5÷2.5
x=4.6
4(x+5)=9x+12.5
4x+20=9x+12.5
5x=7.5
x=1.5
0.9(x-3)-0.8x=2
0.9x-2.7-0.8x=2
0.1x=4.7
x=47
(3/4)*(84-x)=1/2x+18
252-3x=2x+36
5x=216
x=4.32
(x+4)/(0.4)=18
x+4=18*0.4=7.2
x=3.2
(13-x)/(21-x)=8/13
8(21-x)=13(13-x)
168-8x=169-13x
5x=1
x=1/5
(4又1/2x-3)/(3x-1)=1/2
2(4.5x-3)=3x-1
9x-6=3x-1
6x=5
x=5/6
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