问题
解答题
|
答案
(1)50%x-30%x=1,
(50%-30%)x=1,
0.2x=1,
0.2x÷0.2=1÷0.2,
x=5;
(2)65%x+x=16.5,
(65%+1)x=16.5,
1.65x=16.5,
1.65x÷1.65=16.5÷1.65,
x=10;
(3)x÷45%=100,
x÷45%×45%=100×45%,
x=45;
(4)75%x-50=25,
75%x-50+50=25+50, |
75%x÷75%=75÷75%,
x=100.