作业帮英文数学题,用方程式,在线等!
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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
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