решить уравнение 9-2х=81-6х
9-2х=81-6х
9-81=-6х+2х
-72=-4х
х=18
6x-2x=72
4x=72
x=18
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9-2х=81-6х
9-81=-6х+2х
-72=-4х
х=18
9-2х=81-6х
6x-2x=72
4x=72
x=18