Question

ex 1 a b si c dau coroana urgent va rog sa ma ajutați ​

Answer 1

Răspuns:

le-am pus sper sa te ajut

Answer 2

a)

$x = \frac{3y - 5}{2}$

$x = \frac{ - 13 - y}{3}$

$\frac{3y - 5}{2} = \frac{ - 13 - y}{3}$

$9y - 15 = - 26 - 2y$

$11y = - 11$

$y = - 1$

$x = - 4$

b)

$x = (2 - \frac{y}{4} ) \times 3$

$x = \frac{8 - y}{4} \times 3 = \frac{24 - 3y}{4}$

$x = y - 1$

$24 - 3y = y - 1$

$4y = 25 = > y = 6.25$

$x = 5.25$

c)

$2x + 2(y - 1) - y = - 3 = > 2x = - 3 - 2(y - 1) + y = > x = \frac{ - 3 - 2(y - 1) +y}{2}$

$3x - 4y = - 3x$

$6x = 4y = > x = \frac{2y}{3}$

$- 9 - 6y + 6 + 3y = 4y$

$- 3 - 3y = 4y$

$7y = - 3$

$y = - 0.(428571)$

$x = - 0.(285714)$

COROANA?