(90-x)/(180-x)=3/7
来源：学生作业帮助网 编辑：六六作业网 时间：2024/11/25 18:23:28
(90-x)/(180-x)=3/7(90-x)/(180-x)=3/7(90-x)/(180-x)=3/7(90-x)/(180-x)=3/77(90-x)=3(180-x)630-7x=540-3
(90-x)/(180-x)=3/7
(90-x)/(180-x)=3/7
(90-x)/(180-x)=3/7
(90-x)/(180-x)=3/7
7(90-x)=3(180-x)
630-7x=540-3x
4x=90
x=45/2
十字相乘
7*(90-x)=3*(180-x)
x=22.5
90-x 3
----- = -----
180-x 7
630-7x=540-3x
630=540+4x
x=22.5
(90-x)/(180-x)=3/7
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
解方程：x(3x-4)+2x(x+7)=5x(x-7)+90
若x(3x-4)+2x(x+7)=5x(x-7)+90,则x=
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少
求解下面的一些方程,好的我加50财富啊(170-x)*1/3-1/4x=102/3x+(135-x)*4/5=983x+2(100-x)=3004x-3(20-x)=6x-7(11-x)23-x/x+19=1/5x+180/90=x-180/60
2x+3x+4x+5x+x+6x+7x=100
x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=?
已知3x*x-x=1,求6x*x*x+7x*x-5x+2000
180-X÷90-X=3
3x+7x=( )+( )X( )
7x-3x+x=60
(x+7)+x+3x=17
(x+1)/(x+2)+(x+8)/(x+9)解答x+1/x+2+x+8/x+9=x+2/x+3+x+7/x+8
7(X+6)-3X=90
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
3x+2(100-x)=300 4x-3(20-x)=6x-7(11-x) x+18/90=x-180/60 1-(2y-5)/6=3-y/4