(1/10+1/2)x=0.24
(3/5)x=0.24
x=0.24÷3/5
x=0.4(1/10+1/2)x=0.24到(3/5)x=0.24怎么变的？怎么1/10+1/2就变成3/5了呢？1/10+1/2=1/10+5/10=6/10=3/56/10~怎么来的？1/10+5/10=6/10