9(X+0.5)=10(X-0.5)9X+4.5=10X-5X=0.5为什么这样解?简单呗...
9(X+0.5)=10(X-0.5)9X+4.5=10X-5X=9.5解方程不是就这样解吗??
45(x+0.5)=50(x+0.5)-50(50-45)(x+0.5)=50x+0.5=10x=9.5
45x+45*0.5=50x-50*0.55x=47.5x=9.5
9(X+0.5)=10(X-0.5)9X+4.5=10X-5X=9.5