(X-24)*(1-40%)=24+(X-24)*40% 要过程.
问题描述:
(X-24)*(1-40%)=24+(X-24)*40% 要过程.
答
(x-24)×(1-40%)=24+(x-24)×40%
(x-24)×3/5 =24+2/5x-9.6
3/5x-14.4=2/5x+14.4
1/5x=28.8
x=144