Question

4,5: а + 1,75 = 3 19/28
Полное решение

Answer 1

$4.5: a + 1.75 = 3\dfrac{19}{28}$

$4.5: a + 1.75 = \dfrac{103}{28}$

$4.5: a + \dfrac{7}{4} = \dfrac{103}{28}$

$4.5: a = \dfrac{103}{28} - \dfrac{7}{4}$

$4.5: a = \dfrac{103}{28} - \dfrac{49}{28}$

$4.5: a = \dfrac{54}{28}$

$4.5: a = \dfrac{27}{14}$

$\dfrac{9}{2}: a = \dfrac{27}{14}$

$a = \dfrac{9}{2} : \dfrac{27}{14}$

$a = \dfrac{9\cdot 14}{2\cdot 27}$

$a = \dfrac{7}{3}$