Ответы на вопрос:
2х - 4 = 22; 2х = 22 + 4; 2х = 26; х = 26 : 2; х = 13 (48/2) / х = 6; 24 : х = 6; х = 24 : 6; х = 4 18х + 40 = 94; 18х = 94 - 40; 18х = 54; х = 54 : 18; х = 3 (12 + 2х) + 14 * 2 = 44; 12 + 2х + 28 = 44; 2х = 44 - 12 - 28; 2х = 4; х = 2 28 - 2х = 2; 2х = 28 - 2; 2х = 26; х = 26 : 2; х = 13
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