Răspuns :

Cocirmariadenisid

Răspuns:

Explicație pas cu pas:

a)  

1 + 6 x = 13

6 x = 13 - 1

6 x = 12

x = 12 : 6

x = 2 ∈ Z

verific:    1 + 6 x = 1 + 6 × 2 = 1 + 12 = 13

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b)

10 x = 70

x = 70 : 10

x = 7

Verific:   10 x = 10 × 7 = 70

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c)

x : ( - 8 ) = 10

x = 10 × ( - 8)

x = - 80 ∈ Z

Verific:

x : ( - 8 ) = ( - 80 ) : ( - 8) = 10

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