(x-30)/(180-x+30)=2/3怎样解?
问题描述:
(x-30)/(180-x+30)=2/3怎样解?
答
(x-30) / (180-x+30)=2/3 可转换为
(x-30) * 3 = (180-x+30) * 2
3x - 90 = 360 - 2x + 60
5x = 510
x = 102