cat este (37 supra 12-3 supra 4):28 supra 5 +21 supra 36

( 37 /12 - 3/4) : 28/5 + 21/36=
(37/12 - 9/12) :28/5 + 21/36 =
28/12 : 28/5 + 21/36 =
28/12 x 5/28 + 21/36 =
5/12 + 21/36 =
numitorul comun este 36 , amplific prima fractie cu 3
15/36+ 21/36 =36/36 = 1

[tex]( \frac{37}{12} - \frac{3}{4} ) \div \frac{28}{5} + \frac{21}{36} [/tex]

[tex] = ( \frac{37}{12} - \frac{9}{12} ) \times \frac{5}{28} + \frac{7}{12} [/tex]

[tex] = \frac{37 - 9}{12} \times \frac{5}{28} + \frac{7}{12} [/tex]

[tex] = \frac{28}{12} \times \frac{5}{28} + \frac{7}{12} [/tex]

[tex] = \frac{5}{12} + \frac{7}{12 }[/tex]

[tex] = \frac{5 + 7}{12} [/tex]

[tex] = \frac{12}{12} [/tex]

[tex] = 1[/tex]