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rezolvati ecuatia
121+6(x+2)=4(x+2)+139


Răspuns :

121+6x+12=4x+8+139
121+12+6x=4x+147
133+6x=4x+147
2x=14
x=14/2
x=7

Sper ca te-am ajutat =)
[tex]121+6*(x+2)=4*(x+2)+139 \\ 121+6x+12=4x+8+139 \\ 6x+133=4x+147 \\ 6x-4x=147-133 \\ 2x=14 \\ x=14:2 \\ x=7.[/tex]