Question

rezolvați cele 3 ex din imagine va rog ​

Answer 1

Ex 1.

$(x + 2 \frac{8}{15} ) \frac{3}{2} = 5 \frac{1}{4} \\ \\ (x + \frac{38}{15} ) \frac{3}{2} = \frac{21}{4} \\ \\ x + \frac{38}{15} = \frac{21}{4} \times \frac{2}{3} \\ \\ x + \frac{38}{15} = \frac{7}{2} \\ \\ 30x + 76 = 105 \\30 x = 29 \\ x = \frac{29}{30}$

Ex 2.

$\frac{5}{12} \: \: din \: \: \: 360 = \\ \\ = \frac{5}{12} \times 360 = \\ \\ = \frac{5 \times 360}{12} = \\ \\ = \frac{1800}{12} = \\ \\ = 150$

Ex 3.

$30\% \: \: \: din \: \: \: 50 = \\ \\ = \frac{30}{100} \times 50 = \\ \\ = \frac{30}{2} \times 1 = \\ \\ = \frac{30}{2} = \\ \\ = 15$