0.26*3+0.9X=90%
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0.26*3+0.9X=90%0.26*3+0.9X=90%0.26*3+0.9X=90%0.26*3+0.9X=90%0.78+0.9x=0.90.9x=0.12x=2/15X=2/154/30.2
0.26*3+0.9X=90%
0.26*3+0.9X=90%
0.26*3+0.9X=90%
0.26*3+0.9X=90%
0.78+0.9x=0.9
0.9x=0.12
x=2/15
X=2/15
4/3
0.26*3+0.9X=90%
0.78+0.9X=0.9
0.9X=0.9-0.78
X=0.12/0.9
X=2/15
0.26*3+0.9X=90%
3x-x=0.9求x
3X-X=0.9
解方程:x(3x-4)+2x(x+7)=5x(x-7)+90
帮个忙 解个方程15X+5=8X+40 15x+5=8x+40 9x-0.9*7=2x+2.1 3x-0.2*10=2x 96+6x=90+8x 0.5x+30-0.3x=420 4x-2=9x-6
若x(3x-4)+2x(x+7)=5x(x-7)+90,则x=
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!)+.
3x-x=0.9 解方程
5(x-1.7)/(x+0.9)=3
3x-x=0.9怎么解
0.26乘3-0.9X=6%
0.26*3-0.9x=6/100
解方程6x+3x=90+4x
(x-2)/30+(x-3)/45+x/90=1
90/x-90/3x=3
180-X÷90-X=3
(90-x)/(180-x)=3/7
1/3x+90=x