Автор - Rakovina

Х+3=3х-7

7х+2=3х-10
По действиям

Ответ

Автор - italieva13
Х +3 = 3х -7
Х -3х= -7-3
-2х= -10
Х = 5

7х+2=3х-10
7х-3х =-10-2
4х =-12
Х= -3

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