(10+X)(800-100X)=12000怎么解

（X+X)+(X-X)+(X*X)+(X/X)=100 X+X-10+X+8=100 求x:x(10^x)=100 100-2x+5x=120(x+3)×5-2x=30100-(4x+1)-(4x+1)=204x+8=6x-10 100-2x+5x=120(x+3)×5-2x=30100-(4x+1)-(4x+1)=204x+8=6x-10 100×2x+10x+3x+216=100×3x+10×2x+x 100(X - 2) + 10X + 2X = 100*2X + 10X + X - 2 - 495 一元一次方程：x-100/50-2=x-100/60+5 x/120-x/130=2 6x+x-1/5+1=100 2x-1/3-10x+1/12=2x+1/4-1 X+X+X+X+X+X+100X=1690 问：X等于多少 求x 的值.x +3.5x =9.9;4.25x -x =4.55;10x -2.7x =58.4;6.8x +3.2x =100 100(x+4)+10x+(x+2)=21[10x+(x+2)] 一道一元一次方程,[100x+10(x-2)+24-x-(x-2)]-(10x+x)=100[24-x-(x-2)]+10(x-2)+x[100x+10(x-2)+24-x-(x-2)]-(10x+x)=100[24-x-(x-2)]+10(x-2)+x 100X的平方+10（X+3)+X=202+25(X+3) 求X (x-120)/120=(120+x-100)/(x-120+100) （60-x)(120-x)=800x是多少 800/x(100-x)=1800/100-x 10x+x=800-6x 是怎么算? (x+60)x(1+10%)-(1-20%)x=120