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rezolvati in multimea numerelor rationale ecuatia x+5/3+2x+3/4=x-5/6+7/12

Răspuns :

Mai intai amplifici pana ajungi sa ai numitorul comun 12 peste tot, adica cu: 12, 4, 6, 3, 12, 2, exact in ordinea in care sunt, iar mai apoi: 
12x+20+12x+9=12x-10+7
24x+29=12x-3
24x-12x=-29-3
12x=-32
x=-32 supra 12
x= -8 supra 3 
 [tex]\frac{x+5}{3}+2x+\frac{3}{4}=x-\frac{5}{6}+\frac{7}{12}\;\;|_{\cdot12}\\
4x+20 + 24x + 9 =12x-10+7\\ 4x+24x-12x=-20-12+7\\
16x=-25\;\;\rightarrow\;\;x=\,-25/16[/tex]