x-50/3=x+70/5?
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x-50/3=x+70/5?
![x-50/3=x+70/5?](/uploads/image/z/15744355-43-5.jpg?t=x-50%2F3%3Dx%2B70%2F5%3F)
两边乘15
5(x-50)=3(x+70)
5x-250=3x+210
5x-3x=210+250
2x=460
x=460÷2
x=230
5(x-50)=3(x+70)
5x-250=3x+210
5x-3x=210+250
2x=460
x=460÷2
x=230
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!)+.
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
5x/(x+3)(x+2)+2x-5/(x-4)(x+3)=7x-70/(x+2)(x+4)
5x/(x+3)(x+2)+(2x-5)/(x-4)(x+3)=(7x-70)/(x+2)(x+4)
2x+3x+4x+5x+x+6x+7x=100
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
已知3x*x-x=1,求6x*x*x+7x*x-5x+2000
3x+5x=?x等于
5X+6(X+10)+10(X+30)+6(X+70)+3(X+150)=2730,X等于多少
5*(x-2)=4*(x+3) 2x+(50-x)*4=140 3x-(8-x)=20*4 200x=(x-0.5)*2
x-50/3=x+70/5的意义是