Question

Sa se afle x si y daca suma lor este 35 si 2x+3y/3y=3/2 Varog repede dau coroana.

Answer 1

$x + y = 35$

$\frac{2x + 3y}{3y} = \frac{3}{2}$

$2(2x + 3y) = 3 \times 3y$

$4x + 6y = 9y$

$4x = 9y - 6y$

$4x = 3y$

$x = \frac{3y}{4}$

$\frac{3y}{4} + y = 35 \: | \times 4$

$3y + 4y = 140$

$7y = 140$

$y = \frac{140}{7}$

$y = 20$

$x = \frac{3y}{4}$

$x = \frac{3 \times 20}{4}$

$x = 3 \times 5$

$x = 15$