10%X=0.4 X+25%X=10 9%X-4.5×0.2=1.8
10%X=0.4 X+25%X=10 9%X-4.5×0.2=1.8
x*x+2x+x*x+10x+x*x+25+2x+x*x+1+1+16+x*x+4x*x+9-12x+16x*x+4-1
42X+25X=134检验 9.4X-0.4X=16.2检验
4x-2=3x+1 -x+3=10 x-7=11-x x=四分之一x+6
方程x+1x+2+x+8x+9=x+2x+3+x+7x+8
数学题(x-4)/(x-3)+(x-6)/(x-5)=(x-8)/(x-7)+(x-10)/(x-9)解方程,
X/50%=10 9分之X-15分之X=16%
1.9x+10/7x=5.2
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
解方程:1.60%+25=40 2.X-10%X=18 3.x+30%X=52 4.(1-25%)X=36
4(x-3)=2x 8x+0.5=4x+4.5 4x+20=6x-10 解方程
设f(x)=min{2∧x,x+2,10-x}(x≥0),求f(x)最大值