Предмет: Алгебра, автор: KissVera

для какого уравнения число 2 является корнем?
а)3х-9=3
б)16-3х=10

Ответы

Автор ответа: annalovevosxod2
0
а)3х-9=3
3х=3+9
3х=12
х=12÷3
х=4
б)16-3х=10
-3х=10-16
-3х=-6
х=-6:(-3)
х=2
Автор ответа: mobbydyk
0
для второго подставляем 2 вместо x
будет 16-3×2=10
16-6=10
10=10
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