Răspuns: [tex]\boxed{\boxed{\bf \dfrac{80}{21}}}~~\bf sau ~~\boxed{\boxed{\bf 3\dfrac{17}{21}}}[/tex]
Explicație pas cu pas:
Salutare!
[tex]\bf 7+\dfrac{1}{7} -4+\dfrac{2}{3} =[/tex]
[tex]\it~~~[/tex]
[tex]\bf \!{^{^{^{^{^{^{\displaystyle\bf 21)}}}}}}}\!\!\!\dfrac{7}{1}+\!{^{^{^{^{^{^{\displaystyle \bf 3)}}}}}}}\!\!\!\dfrac{1}{7} -\!{^{^{^{^{^{^{\displaystyle\bf 21)}}}}}}}\!\!\!\dfrac{4}{1}+\!{^{^{^{^{^{^{\displaystyle \bf 7)}}}}}}}\!\!\!\dfrac{2}{3} =\dfrac{147}{21}+\dfrac{3}{21} -\dfrac{84}{21}+\dfrac{14}{21} = \dfrac{147+3-84+14}{21}=[/tex]
[tex]\it~~~[/tex]
[tex]\boxed{\boxed{\bf \dfrac{80}{21}}}~~\bf sau ~~\boxed{\boxed{\bf 3\dfrac{17}{21}}}[/tex]
PS: Te rog sa glisezi spre dreapta pentru a vedea toată rezolvarea
#copaceibrainly
