30x+100=50x-10

30x+100=50x-10 （X+X)+(X-X)+(X*X)+(X/X)=100 30-3（3-X）=4X 3X+12*6=15X+12 4X-2(50-X)=20 12(X-13)=10(X+3) 100-X=3(20+X) 30%x+10%(100-x)=100*x的过程 30%x=50%x-20x 80%x+30-x=10%x X+X-10+X+8=100 求x:x(10^x)=100 (x-10)/x*100%=50%求解 X×X-(X-10)(X-10)=30×30 50％x+x=20 x+30％x=52 请详细讲讲这题100(0.1X-0.2)/2-10(X+1)/5=3 500(0.1X-0.2)-20(X+1)=30 50X-100-20X-20=30 30X=150 X=5 30(x+5)=26x+10x(x+5) x-50%x=100 解方程,5%x-7.5%x=22.5 25%x-7%x=36 2.3%x+x%=6.6 x-30%x=1.4 x÷50%=10 65%x-25%x=8 x(10-x)=50 x=?x(10-x)=50x=? 100×2x+10x+3x+216=100×3x+10×2x+x 100(X - 2) + 10X + 2X = 100*2X + 10X + X - 2 - 495