Question

Va roooog!!
Alege raspunsurile corecte:
1) Solutia ecuatiei 2x-4=3x+2, x apartine de Z este
a)1 b)-1 c)-6, d)0

2)Multimea solutiilor ecuatiei: -2x+1=x+7, x apartine N este:
a){-2} b)nu are solutie c){0} d){3}

Answer 1

Răspuns:

2x-4=3x+2

-4-2=3x-2x

-6=x

raspuns c

________

-2x+1=x+7

1-7=x+2x

-6=3x=>x=-6:3=>x=-2

raspuns a