解方程 (为了区分乘号和x,乘号用*表示) 7x-2.5x+3x-1.5x=15*4-6*3x/ 2+3/2x=76x-7=4x-56(1/2-4)+2x=7-(1/3x-1)5x-1/4=(3x+1)/2-(2-x)/3(3x+2)/2-1=(2x-1)/4-(2x+1)/5注:“/”为分数线 例:(2x+1)/5读作:五分之(二x加一)
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![解方程 (为了区分乘号和x,乘号用*表示) 7x-2.5x+3x-1.5x=15*4-6*3x/ 2+3/2x=76x-7=4x-56(1/2-4)+2x=7-(1/3x-1)5x-1/4=(3x+1)/2-(2-x)/3(3x+2)/2-1=(2x-1)/4-(2x+1)/5注:“/”为分数线 例:(2x+1)/5读作:五分之(二x加一)](/uploads/image/z/581947-43-7.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B+%28%E4%B8%BA%E4%BA%86%E5%8C%BA%E5%88%86%E4%B9%98%E5%8F%B7%E5%92%8Cx%2C%E4%B9%98%E5%8F%B7%E7%94%A8%2A%E8%A1%A8%E7%A4%BA%29+7x-2.5x%2B3x-1.5x%3D15%2A4-6%2A3x%2F+2%2B3%2F2x%3D76x-7%3D4x-56%281%2F2-4%29%2B2x%3D7-%281%2F3x-1%295x-1%2F4%3D%283x%2B1%29%2F2-%282-x%29%2F3%283x%2B2%29%2F2-1%3D%282x-1%29%2F4-%282x%2B1%29%2F5%E6%B3%A8%EF%BC%9A%E2%80%9C%2F%E2%80%9D%E4%B8%BA%E5%88%86%E6%95%B0%E7%BA%BF+%E4%BE%8B%EF%BC%9A%282x%2B1%29%2F5%E8%AF%BB%E4%BD%9C%EF%BC%9A%E4%BA%94%E5%88%86%E4%B9%8B%EF%BC%88%E4%BA%8Cx%E5%8A%A0%E4%B8%80%EF%BC%89)
解方程 (为了区分乘号和x,乘号用*表示) 7x-2.5x+3x-1.5x=15*4-6*3x/ 2+3/2x=76x-7=4x-56(1/2-4)+2x=7-(1/3x-1)5x-1/4=(3x+1)/2-(2-x)/3(3x+2)/2-1=(2x-1)/4-(2x+1)/5注:“/”为分数线 例:(2x+1)/5读作:五分之(二x加一)
解方程 (为了区分乘号和x,乘号用*表示) 7x-2.5x+3x-1.5x=15*4-6*3
x/ 2+3/2x=7
6x-7=4x-5
6(1/2-4)+2x=7-(1/3x-1)
5x-1/4=(3x+1)/2-(2-x)/3
(3x+2)/2-1=(2x-1)/4-(2x+1)/5
注:“/”为分数线 例:(2x+1)/5
读作:五分之(二x加一)
解方程 (为了区分乘号和x,乘号用*表示) 7x-2.5x+3x-1.5x=15*4-6*3x/ 2+3/2x=76x-7=4x-56(1/2-4)+2x=7-(1/3x-1)5x-1/4=(3x+1)/2-(2-x)/3(3x+2)/2-1=(2x-1)/4-(2x+1)/5注:“/”为分数线 例:(2x+1)/5读作:五分之(二x加一)
解方程:
7x-2.5x+3x-1.5x=15×4-6×3
(7-2.5+3-1.5)x=60-18
6x=42
x=7
x/ 2+3/2x=7
(1/2+3/2)x=7
2x=7
x=3.5
6x-7=4x-5
6x-4x=7-5
2x=2
x=1
6(1/2-4)+2x=7-(1/3x-1)
6×1/2-6×4+2x=7-1/3x+1
3-24+2x=8-1/3x
2x-21=8-1/3x
5/3x=29
x=17.4
5x-1/4=(3x+1)/2-(2-x)/3
5x-1/4=3/2x+1/2-2/3+1/3x
5x-1/4=4/3x-1/6
5x-4/3x=1/4-1/6
11/3x=1/12
x=3/132
(3x+2)/2-1=(2x-1)/4-(2x+1)/5
3/2x+1-1=1/2x-1/4-2/5x-1/5
3/2x=1/10x-9/20
1/10x-3/2x=9/20
-7/5x=9/20
x=-9/28