问题
解答题
|
答案
(1)20%X=10,
20%X÷20%=10÷20%
x=50;
(2)95%X-65%X=9,
30%x=9,
30%x÷30%=9÷30%,
x=30;
(3)50%X-30%X=5.5,
20%x=5.5,
20%x÷20%=5.5÷20%,
x=27.5;
(4)X+350%X=90,
450%x=90,
450%x÷450%=9÷450%,
x=2;
(5)12X+4X=128,
16x=128,
16x÷16=128÷16,
x=8;
(6)X-80%X=40,
20%x=40,
20%x÷20%=4÷20%,
x=20.