2×(х - 3) = 9 + 2х
2х - 6 = 9 + 2х
2х - 2х = 9 + 6
х = 15
2 ( − 3 ) = 9 + 2
2 − 6 = 9 + 2
2 − 6 =9 + 2
2 − 6 = 2 + 9
2 − 6 + 6 = 2 + 9 + 6
2 = 2 + 1 5
2 − 2 = 2 + 1 5 − 2
0 = 1 5
