0.8:15/4+(5-x):0.75
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0.8:15/4+(5-x):0.75
″喵
0.8:15/4+(5-x):0.75
″喵
0.8:15/4+(5-x):0.75
![0.8:15/4+(5-x):0.75](/uploads/image/z/17092318-22-8.jpg?t=0.8%EF%BC%9A15%2F4%2B%EF%BC%885-x%29%3A0.75)
题目应是 0.8:15/4=(5-x):0.75
0.8*3/4=15/4*(5-x)
2.4=75-15x
15x=72.6
x=4.84
再问: 对对对的,谢谢哦″
0.8*3/4=15/4*(5-x)
2.4=75-15x
15x=72.6
x=4.84
再问: 对对对的,谢谢哦″
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
(1)2(x+15)-21=3x-15 (2)3(x+8)=5x+8 (3)4(x+5*0.8)=7x+5*0.8 (4
[(x+3分之x+2)-(x+2分之x+1)+(x+5分之x+4)-(x+4分之x+3)]除以[(x平方+8x+15)分
5x+7=2x+21,0.13x+12=0.8x-1,3(x-7)-(x-4)=15,解方程,急,
∫(x^4-4x^2+5x-15)/(x^2+1)(x-2) dx=?
5/x-4/x等于15 x等于多少
15-(4-5x)=2x+(35-3x)
0.75x-1/2x=-5;3x+5=4x+1;3X+5=4X+18;1-7x=x-7;9x+8-7x=3x;-(x-2
5x+15>4x-1
5x+15>4x-13
4x+18=5x-15
5/2x-x等于15/4