" 90%*[1.3x+1.2*(2000-x)]=2000+277”怎么解啊?分很高
" 90%*[1.3x+1.2*(2000-x)]=2000+277”怎么解啊?分很高
X-(X-2000-X*0.18)*0.15-X*0.18=7000 怎么解,
1.2x-x=22怎么解?
3x-(x+2000)=20000怎么解?
x(-0.5x+65)x=2000 怎么算?
(x-1)×(x+1)+x=19怎么解啊?
x-(1/3x+2000)+6000=(1-1/6)x怎么去解?
(x+12)*(x+12)=x*x+360怎么解
x^2=(x+30)X(x-18)怎么解
X-(0.2X+10) -1.2*(0.2X+10)+8=0.36X 怎么解
x-1/2x+27=4/5x x=90 这个方程怎么解?
(8-x)(8-x)+(7-x)(7-x)=25怎么解啊