сравни уравнения 3*(х-2)=10-х
3 * (х - 2 ) = 10 - х
3х - 6 = 10 - х
3х + х = 10 + 6
4х = 16
х =16 : 4
х =4
проверка:
3 *( 4 - 2 ) = 10 - 4
6 = 6
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