4000X+4000X=?
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4000X+4000X=?4000X+4000X=?4000X+4000X=?8000x
4000X+4000X=?
4000X+4000X=?
4000X+4000X=?
8000x
y=x(14800-x)/4000 x
4000X+4000X=?
方程2000x平方+4000x=80 求x
500x[5/6X-4]=4000X
(0.3-x)(500+4000x)=180
(0.3-x)(500+4000x)=180
130x-x²=4000
(X+X)+(X-X)+(X*X)+(X/X)=100
x*x*x*x*x=80000?
4000/X=5000/(x+20)求方程解
4X²+260X+4000=1080
解方程(x-4000)[14-(x-4800)/50]=10000
500×5%+1500×10%+[x-4000]15%=x-4250
x*x*x=504 x*x*x=504
(x+x)+(x-x)+(x/x)=11.2
4000/X-4000/(X+10)=20 解分式方程....两边同乘X(x+10)然后呢?
f(x)=x,x
x+x=x+15