问题
解答题
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答案
(1)50%x+30%x=8,
80%x=8,
80%x÷80%=8÷80%,
x=10,
(2)
÷x=30 7
,2 28
:x=2:28,30 7
2x=
×28,30 7
2x÷2=120÷2,
x=60.
|
(1)50%x+30%x=8,
80%x=8,
80%x÷80%=8÷80%,
x=10,
(2)
÷x=30 7
,2 28
:x=2:28,30 7
2x=
×28,30 7
2x÷2=120÷2,
x=60.