问题
解答题
求未知数 x-25%x=
5x-3
|
答案
(1)x-25%x=4 15
(1-25%)x=4 15
75%x=4 15
75%x÷75%=
÷75%4 15
X=16 45
(2)
÷3 8
x=3 8 1 8
÷3 8
x×3 8
x=3 8
×1 8
x3 8
=3 8
x3 64
x÷3 64
=3 64
÷3 8 3 64
x=8
(3)5x-3
=253 4
5x-3
+33 4
=25+33 4 3 4
5X=283 4
5X÷5=28
÷53 4
X=23 4