X+3.5X=9.9怎么解X+3.5X=9.94.5X=9.9X=2.2

X+3.5X=9.9怎么解X+3.5X=9.94.5X=9.9X=2.2 3.5x=0.15+x怎么解 3.5x+x=18怎么解 X/3.5=X-180 怎么解 x-3.5x+5=80%x怎么解 x*x-x=90怎么解 3.5x-x=373.5x-x=37这道题怎么解 x+3.5x=90怎么算? 3.5x=x+3.65怎么算 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