问题
解答题
求未知数x
(l)x-70%x=30
(2)0.25x+x=125.
答案
(l)x-70%x=30
0.3x=30,
0.3x÷0.3=30÷0.3,
x=100;
(2)0.25x+x=125,
1.25x=125,
1.25x÷1.25=125÷1.25,
x=100.
求未知数x
(l)x-70%x=30
(2)0.25x+x=125.
(l)x-70%x=30
0.3x=30,
0.3x÷0.3=30÷0.3,
x=100;
(2)0.25x+x=125,
1.25x=125,
1.25x÷1.25=125÷1.25,
x=100.