7/15*14/9+23/15/9/14-14/9 解方程:15/4x=0.8:4/15 2x:3.5=25% 2*(x
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7/15*14/9+23/15/9/14-14/9 解方程:15/4x=0.8:4/15 2x:3.5=25% 2*(x -2)+3*(4x-1)=18
7/15*14/9+23/15/9/14-14/9
=7/15x14/9+23/15x14/9-14/9
=(7/15+23/15-1)x14/9
=1x14/9
=14/9
15/4x=0.8:4/15
x=15/4x4/15÷0.8
x=5/4
2x:3.5=25%
x:1.75=25%
x=7/4x1/4
x=7/16
2*(x -2)+3*(4x-1)=18
2x-4+12x-3=18
2x+12x=18+7
14x=25
x=25/14
如果本题有什么不明白可以追问,
=7/15x14/9+23/15x14/9-14/9
=(7/15+23/15-1)x14/9
=1x14/9
=14/9
15/4x=0.8:4/15
x=15/4x4/15÷0.8
x=5/4
2x:3.5=25%
x:1.75=25%
x=7/4x1/4
x=7/16
2*(x -2)+3*(4x-1)=18
2x-4+12x-3=18
2x+12x=18+7
14x=25
x=25/14
如果本题有什么不明白可以追问,
7/15*14/9+23/15/9/14-14/9 解方程:15/4x=0.8:4/15 2x:3.5=25% 2*(x
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
六道解方程4×(0.8-x)=1.45+2/3x-1/2x=1210x+9=8x+19115%x+15%x=1.32x-
解方程X-0.5X=15 X-0.8X=10 2.5X+2X=9
解方程:(x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8)
解方程】(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
解方程6*25^x=9^x+15^x
解方程8x=2/3 4/5x=7/10 2/3x=14/15 5/9x=10
解方程 4x-2/3=4/9 5/8x-1/3x=14/15
解方程 x除以11/18=3/4 2/3x=8/15 3/7x +1/14x=9
计数 99-43X-9 48X-8+7X (X+8)x(X+8) 解方程 17+7X=2X+32 3X+25=7X-15