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[(x+8:2)*3+5]×5=115​

Răspuns :

Salutare!

[tex] \bf[(x+8:2)\cdot3+5] \cdot5=115 \: |:5\: \text{(\it imprtim toata relatia cu 5)}[/tex]

[tex]\bf(x+8:2) \cdot3+5 =23[/tex]

[tex]\bf(x+4) \cdot 3 =23 - 5[/tex]

[tex]\bf(x+4) \cdot 3 =18 \: \: | : 3 \: \text{(\it imprtim toata relatia cu 3)}[/tex]

[tex]\bf x+4=6[/tex]

[tex]\bf x=6 - 4[/tex]

[tex] \boxed{\bf x = 2}[/tex]

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