x+5(52-x)=100
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x+5(52-x)=100x+5(52-x)=100x+5(52-x)=100x+5(52-x)=100x+260-5x=100x-5x=100-260-4x=-160x=-160÷(-4)x=40x
x+5(52-x)=100
x+5(52-x)=100
x+5(52-x)=100
x+5(52-x)=100
x+260-5x=100
x-5x=100-260
-4x=-160
x=-160÷(-4)
x=40
x+5(52-x)=100
x+260-5x=100
260-4x=100
4x=260-100
4x=160
x=160/4
x=40
x+5(52-x)=100
(X+X)+(X-X)+(X*X)+(X/X)=100
(x+1)X百分之三十+(100-X)X百分之二十五=2/5X
x-2x+3x-4x+5x.+99x-100x=25求解
2x+3x+4x+5x+x+6x+7x=100
(X/80+X/100 +5)*40=X,
已知:f(x)=x(x-1)(x-2)(x-3)……(x-100),求f'(5)
100x-x=52
(5x+x)(x-5x)=100
60%x+25=40 x+30%x=52 19-120%x=7 4分之3x-5%x=17.5 x-10%x=18 (1-25%)x=36 2x+30%x=9.2
5x+15x =( + )x =20x
(1)(5-x)/(x-4)+1/(4-x)=1(2)1/(x^3+2x^2+x) + 1/(x^2+2x+1) =5/(2^2+2x)(3)(1-x)/(1+x+x^2) + 6/(1-x)=7/(1-x)(4)52/(x-8)=48/x + 4/(x-26)
解方程:2x+4x+6x...+100x=1-(x+3x+5x+...+99x)
1x+2x+3x+4x+5x+6x+7x…+99x=100
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)
3/x-1=4/x 6/x+1=x+5/x(x+1)
(x+x)+(x-x)+(x/x)=11.2
(100-2x-10x)/5=20-2x-2/5*x