2x/(x+12)=1/2怎么算
问题描述:
2x/(x+12)=1/2怎么算
答
2x/(x+12)=1/2
x+12=4x
4x-x=12
3x=12
x=4
答
2x×2=x+12;
4x=x+12;
3x=12;
x=4;
答
2x/(x+12)=1/2 两边乘以 2 (x+12)
4x=x+12
3x=12
x=4