Question

va rog frumos dau coroana ​

Answer 1

$1.x + y + z = 48 \\ \frac{x}{4} = \frac{y}{5} = \frac{z}{7}$

$y = \frac{5x}{4}$

$z = \frac{7x}{4}$

$x + \frac{5x}{4} + \frac{7x}{4} = 48$

$\frac{4x + 5x + 7x}{4} = \frac{192}{4} \\ 16x = 192 \\ x = 192 \div 16 = 12$

$y = \frac{12 \times 5}{4} = 15$

$z = \frac{7 \times 12}{4} = 21$