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aflati pe x din egalitatea:
3x8+1- {4+[15x(8-5x)+23]:4}=4


Răspuns :

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Vezi imaginea GRGANCA
[tex]3*8+1- \{4+[15*(8-5x)+23]:4\}=4 \\\\ 24+1-\{4+[15*(8-5x)+23]:4\}=4 \\\\ -\{4+[15*(8-5x)+23]:4\}=4-24-1 \\\\ -\{4+[15*(8-5x)+23]:4\}=-25+4 \\\\ -\{4+[15*(8-5x)+23]:4\}=-21 \\\\ 4+[15*(8-5x)+23]:4=21 \\\\ (15*(8-5x)+23]:4=21-4 \\\\ (15*(8-5x)+23]:4=17 \\\\ 15*(8-5x)+23=17*4 \\\\ 15*(8-5x)+23=68 \\\ 15*(8-5x)=68-23 \\\\ 15*(8-5x)=45 \\\\ 8-5x=45:15 \\\\ 8-5x=3 \\\\ -5x=3-8 \\\\ -5x=-5 \\\\ \boxed{x=1}[/tex]