12.4x-5.6x-3.4=17怎么解

12.4x-5.6x-3.4=17怎么解 48%x-x=5.6 怎么解? 105.6%x-x=5.6 怎么解? (17-x)-(5+x)=x.怎么解 17X-X×X=30这个方程怎么解 x*x-x=90怎么解 17+x+15-x=14+x+7+x+7+2x怎么解 x^2=(x+30)X(x-18)怎么解 x 5x=21.6-x-5x怎么解 (x+12)*(x+12)=x*x+360怎么解 x-(30-x)=(30-x)-x/3,怎么解 x*x=(x+10)*(x-6)怎么解 x(x+x)=48 求x 怎么解 (x+x+23+x+50)=3x 怎么解 x*x=75%x*(x+3)怎么解? (168+X)/(288+X)=(120-X)/X怎么解 x*x+2*x+1=36,x怎么解, x(x+1)-x(x-1)=188怎么解,