5x+7=42 x/4.2=2 3.6x-x=3.25 2(x-3)=58
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5x+7=42 x/4.2=2 3.6x-x=3.25 2(x-3)=58
5x+7=42 x/4.2=2 3.6x-x=3.25 2(x-3)=58
5x+7=42 x/4.2=2 3.6x-x=3.25 2(x-3)=58
5x+7=42 5x=35 x=7
x/4.2=2 x=2×4.2=8.4
3.6x-x=3.25 2.6x=3.25 x=1.2
2(x-3)=58 2x-6=58 2x=52 x=26
5x+7=42 x÷4.2=2 3.6x-x=3.25 2(x-5x+7=42 x÷4.2=2 3.6x-x=3.25 2(x-3)=5.8.解方程
5x+7=42 x/4.2=2 3.6x-x=3.25 2(x-3)=58
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
4.2-0.6x=3.6x 5x+2x=33.6 7x-4x=0.75 2x+7x+2.1=12 56x-32x-119=361 x+5=2x 3x+9=6x 4x-28=2x 2x+18=7x 5x=25*4-15x 7x-x+2*3=29.4 (28.8+5.5x+3.2)除2=71
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
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=?
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+7)(x+5)-(x+1)(x+5)=42
4.5+x=6.2 x-3.8=6.6 4x=1 5x+7=42 2(x-5)=5.8 3.6x-x=5.8
7x^2-5x=2x^2+x
X-5+8*X=7*X-2*X-1
x-8/x-4=2-x-5/x-7
5x-x+7x-2x-0.09=0.36
x(x+2)(x+3)(x+5)=7
填空:(x+5)(x+?)=x^2+7x+10
1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8 好多年没有用过过数学公式了 想不起来怎么算了 想知道 X值是多少
已知x=2π+1求 |x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|+|x-10|