怎么做啊? 题目在下面 是解方程 急急急急急急急急急急急急急急急急 我不仅要得数,我还要过程。
Ⅹ:7=15:123.2/Ⅹ=48/105(Ⅹ+3):12=49:845:Ⅹ=1/4:1/5============Ⅹ:3/4=1/2:2/5Ⅹ—160/5=384/8=...
Ⅹ:7=15:12 3.2/Ⅹ=48/105 (Ⅹ+3):12=49:84 5:Ⅹ=1/4:1/5
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Ⅹ:3/4=1/2:2/5 Ⅹ—160/5=384/8
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Ⅹ:3/4=1/2:2/5 Ⅹ—160/5=384/8
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Ⅹ:7=15:12 3.2/Ⅹ=48/105 (Ⅹ+3):12=49:84 5:Ⅹ=1/4:1/5
12x=7×15 48x =3.2×105 48(x+3) =12×49 1/4x=1/5×5
12x =105 48x=336 x+3 =12.25 1/4x=1
x =8.75 x=7 x= 9.25 x=4
Ⅹ:3/4=1/2:2/5 Ⅹ—160/5=384/8
2/5x = 3/4 ×1/2 x-32=48
2/5x=3/8 x=48+32
x =15/16 x=80
12x=7×15 48x =3.2×105 48(x+3) =12×49 1/4x=1/5×5
12x =105 48x=336 x+3 =12.25 1/4x=1
x =8.75 x=7 x= 9.25 x=4
Ⅹ:3/4=1/2:2/5 Ⅹ—160/5=384/8
2/5x = 3/4 ×1/2 x-32=48
2/5x=3/8 x=48+32
x =15/16 x=80
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