知识问答
最佳答案:X+(1/3)*(X+(1/3)*(X-9))=(1/9)*(X-9)x+(1/3)*x+(1/9)*(x-9)=(1/9)*(X-9)x+(1/3)*x=0(
最佳答案:先去括号吧1/2(x-3)=2-1/2(x-3).1/2x-1.5=2-0.5x+1.5x-3=2x=5不去括号1/2(x-3)=2-1/2(x-3).1/2(