问题
解答题
求未知数x (1)
(2)9:2.5=3.6:x. |
答案
(1)
x-5=3 4 5 2
x-5+5=3 4
+55 2
x=3 4 15 2
x÷3 4
=3 4
÷15 2 3 4
x=10;
(2)9:2.5=3.6:x
9x=2.5×3.6
9x÷9=9÷9
x=1.
求未知数x (1)
(2)9:2.5=3.6:x. |
(1)
x-5=3 4 5 2
x-5+5=3 4
+55 2
x=3 4 15 2
x÷3 4
=3 4
÷15 2 3 4
x=10;
(2)9:2.5=3.6:x
9x=2.5×3.6
9x÷9=9÷9
x=1.