15x=13(x+10)
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
(2x^-5x+2/6x^+13x+6)*(6x^-5x-6/6x^-17x+10)*(12x^+8x-15/2x^-x
X/15 + X/12 + X/10 = 1365,求X,
30-3(3-X)=4X 3X+12*6=15X+12 4X-2(50-X)=20 12(X-13)=10(X+3) 1
x+x=x+15
解方程 (六分之x+八分之x)乘以3=x-70 15x+13乘以(510-10x)除以13=635
y=根号(x²-2x+10)+根号(x²-6x+13) 求y值域 X定义域
4x-3(x-5)=2x+(x-1) (3x+29)除以8=4x 7(x+10)=5(4x-10) 5分之2(x-15)
130%x+x=4.6 x÷50%=10 x/9-x/15=16%
解方程.(5x/x²+x-6)+(2x-5/x²-x-12)=7x-10/x²-6x+8
一:已知f(x)=(10^x-10^-x)/10^x+10^-x.
(2x-2)(x-1)=0 x(x-5)=5x-10