Question

ex 3 b,c
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Answer 1

Răspuns:

B) x=8 ∈Ζ

C) x=1 ∈Ζ

Explicație pas cu pas:

b) 3(2x+5)=63=>6x+15=63=>6x=63-15=>6x=48=>x=48/6=>x=8 ∈ Ζ

c)6(3x+9)=72=>18x+54=72=>18x=72-54=>18x=18=>x=18/18=>x=1 ∈Ζ