英文数学题,用方程式,在线等!if lily takes 30% and 3 pieces of candy from a box , there are still 11 pieces left. what is the original amount of candy in the box
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英文数学题,用方程式,在线等!if lily takes 30% and 3 pieces of candy from a box , there are still 11 pieces left. what is the original amount of candy in the box
英文数学题,用方程式,在线等!
if lily takes 30% and 3 pieces of candy from a box , there are still 11 pieces left. what is the original amount of candy in the box
英文数学题,用方程式,在线等!if lily takes 30% and 3 pieces of candy from a box , there are still 11 pieces left. what is the original amount of candy in the box
若lily从盒子里拿出30%的糖果后再拿3块,盒子里还剩余11块,问原来有糖果多少块?
设原来糖果有x块,则
30%x+3+11=x
解得x=20（块）
注：列式还可以：实际上剩余11块+3块占了总数的70%
即(1-30%）x=3+11
x=20
设总共有n个糖果，则由题意得：
n - n*30% - 3 = 11 ==> n = 20
即：共有20个糖果
(1-30%)X-3=11
X=20
我用中文回答吧。
设原有糖果x颗。
那么依题意得，x-（30%x+3）=11
解得x=20
0.3x+3+11=x，解出原来盒中有x=20
原题意：Lily从盒中拿走30%另加3块蛋糕，盒中仍然还剩11块，问盒中原有多少？
X-(0.3X+3)=11解得X=20
20