Question

10: x=5, a × 2=10, 2 × x=10, a:2=5.

Answer 1

10 : х = 5
5х = 10
х = 10 : 5
х = 2
--------------------
а* 2 = 10
2х = 10
х = 10 : 2
х = 5
-------------------------
2* х = 10
2х = 10
х = 10 : 2
х = 5
---------------------------
а : 2 = 5
а = 5 * 2
а = 10