30-17x=16.

30-17x=16. (x+30)*(x-18)=x*x 解方程90%(30%x+x)=x+17 17X-X×X=30这个方程怎么解 题是九个未知数的方程式.5X = 6X = 7X = 8X = 10X = 13X = 14X = 17X = 23X == (X + X + X + X + X + X + X + X + X + 30)≤280提示：题中 5 后面的X是未知数1.6 后面的X是未知数2.7后面的X是未知数3.依次类推.题中（X + 5（x²+17)-6(x²+2x)=0 (50-x)(30+2x)=21005（x²+17)-6(x²+2x)=0(50-x)(30+2x)=2100 解方程50%x+30%x=8 X-20％x=40 17-150%x=6.5求列式! (x+7)+x+3x=17 30/x=30/(x-1.5)-x 0.8x=x-30 x= x ( x-30)= -67.5 X=? 17x+13=7x+38 1.9+0.75x-0.1=x 13x-3x=72=12x=30 9.4x-120=8.4x=17x-200 15.2x-0.8=7.4x+70.9x-0.5x+0.28=x+0.1 x-30-0.2x=0.5x 3X+30+X+X-15=? x+35=(x+3x)*30% 60x（x-4)=30x 80%x+30-x=10%x X-30%X+8-X=20