(x-45)/(x-24)=62.5%,怎么算
问题描述:
(x-45)/(x-24)=62.5%,怎么算
答
擦,题目看错,无视。。
答
(x-45)*100=(x-24)*62.5
625x-15000=1000x-45000
375x=30000
x=80
答
去分母,去括号,得x=80
答
X-45=0.625X-15
0.375X=30
X=80
答
两边乘以x-24
x-45=0.625(x-24)
x-45=0.625x-15
x-0.625x=45-15
0.375x=30
x=30÷0.375
x=80
答
(X-45)/(X-24)=62.5%
(X-45)/(X-24)=5/8
(X-45)×8 =(X-24)×5
8X -360 =5X -120
3X =240
X=80