7.5[(X-2.5)/5-1]-5+2.5=X X=27.5
问题描述:
7.5[(X-2.5)/5-1]-5+2.5=X X=27.5
急
答
1.5(x-2.5)-7.5-5+2.5=x 1.5x-3.75-7.5-2.5=x 1.5x-x=13.75 0.5x=13.75 x=27.5
7.5[(X-2.5)/5-1]-5+2.5=X X=27.5
急
1.5(x-2.5)-7.5-5+2.5=x 1.5x-3.75-7.5-2.5=x 1.5x-x=13.75 0.5x=13.75 x=27.5