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REZOLVATI IN R URMATOARELE ECUATII

a) 2(x+1)-5(3x+5)=-2x-5


Răspuns :

[tex]2(x+1)-5(3x+5)=-2x-5 \\ 2x+2-15x-25=-2x-5 \\ -13x-23=-2x-5|*(-1) \\ 13x+23=2x+5 \\ 11x=-18 \\ \boxed{x=- \frac{18}{11}} [/tex]
[tex]2(x+1)-5(3x+5)=-2x-5[/tex]
[tex]<=>2x+2-15x-25=-2x-5[/tex]
[tex]<=>2x-15x+2x+2-25+5=0[/tex]
[tex]<=> -11x-18=0[/tex]
[tex]<=>-11x=18[/tex]
[tex]x=- \frac{18}{11} [/tex]